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1 /*
2 * soc-core.c -- ALSA SoC Audio Layer
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO:
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
23 */
24
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
36 #include <linux/of.h>
37 #include <linux/dmi.h>
38 #include <sound/core.h>
39 #include <sound/jack.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/soc.h>
43 #include <sound/soc-dpcm.h>
44 #include <sound/soc-topology.h>
45 #include <sound/initval.h>
46
47 #define CREATE_TRACE_POINTS
48 #include <trace/events/asoc.h>
49
50 #define NAME_SIZE 32
51
52 #ifdef CONFIG_DEBUG_FS
53 struct dentry *snd_soc_debugfs_root;
54 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55 #endif
56
57 static DEFINE_MUTEX(client_mutex);
58 static LIST_HEAD(platform_list);
59 static LIST_HEAD(codec_list);
60 static LIST_HEAD(component_list);
61
62 /*
63 * This is a timeout to do a DAPM powerdown after a stream is closed().
64 * It can be used to eliminate pops between different playback streams, e.g.
65 * between two audio tracks.
66 */
67 static int pmdown_time = 5000;
68 module_param(pmdown_time, int, 0);
69 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
70
71 /* returns the minimum number of bytes needed to represent
72 * a particular given value */
73 static int min_bytes_needed(unsigned long val)
74 {
75 int c = 0;
76 int i;
77
78 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
79 if (val & (1UL << i))
80 break;
81 c = (sizeof val * 8) - c;
82 if (!c || (c % 8))
83 c = (c + 8) / 8;
84 else
85 c /= 8;
86 return c;
87 }
88
89 /* fill buf which is 'len' bytes with a formatted
90 * string of the form 'reg: value\n' */
91 static int format_register_str(struct snd_soc_codec *codec,
92 unsigned int reg, char *buf, size_t len)
93 {
94 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
95 int regsize = codec->driver->reg_word_size * 2;
96 int ret;
97
98 /* +2 for ': ' and + 1 for '\n' */
99 if (wordsize + regsize + 2 + 1 != len)
100 return -EINVAL;
101
102 sprintf(buf, "%.*x: ", wordsize, reg);
103 buf += wordsize + 2;
104
105 ret = snd_soc_read(codec, reg);
106 if (ret < 0)
107 memset(buf, 'X', regsize);
108 else
109 sprintf(buf, "%.*x", regsize, ret);
110 buf[regsize] = '\n';
111 /* no NUL-termination needed */
112 return 0;
113 }
114
115 /* codec register dump */
116 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
117 size_t count, loff_t pos)
118 {
119 int i, step = 1;
120 int wordsize, regsize;
121 int len;
122 size_t total = 0;
123 loff_t p = 0;
124
125 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
126 regsize = codec->driver->reg_word_size * 2;
127
128 len = wordsize + regsize + 2 + 1;
129
130 if (!codec->driver->reg_cache_size)
131 return 0;
132
133 if (codec->driver->reg_cache_step)
134 step = codec->driver->reg_cache_step;
135
136 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
137 /* only support larger than PAGE_SIZE bytes debugfs
138 * entries for the default case */
139 if (p >= pos) {
140 if (total + len >= count - 1)
141 break;
142 format_register_str(codec, i, buf + total, len);
143 total += len;
144 }
145 p += len;
146 }
147
148 total = min(total, count - 1);
149
150 return total;
151 }
152
153 static ssize_t codec_reg_show(struct device *dev,
154 struct device_attribute *attr, char *buf)
155 {
156 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
157
158 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
159 }
160
161 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
162
163 static ssize_t pmdown_time_show(struct device *dev,
164 struct device_attribute *attr, char *buf)
165 {
166 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
167
168 return sprintf(buf, "%ld\n", rtd->pmdown_time);
169 }
170
171 static ssize_t pmdown_time_set(struct device *dev,
172 struct device_attribute *attr,
173 const char *buf, size_t count)
174 {
175 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
176 int ret;
177
178 ret = kstrtol(buf, 10, &rtd->pmdown_time);
179 if (ret)
180 return ret;
181
182 return count;
183 }
184
185 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
186
187 static struct attribute *soc_dev_attrs[] = {
188 &dev_attr_codec_reg.attr,
189 &dev_attr_pmdown_time.attr,
190 NULL
191 };
192
193 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
194 struct attribute *attr, int idx)
195 {
196 struct device *dev = kobj_to_dev(kobj);
197 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
198
199 if (attr == &dev_attr_pmdown_time.attr)
200 return attr->mode; /* always visible */
201 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
202 }
203
204 static const struct attribute_group soc_dapm_dev_group = {
205 .attrs = soc_dapm_dev_attrs,
206 .is_visible = soc_dev_attr_is_visible,
207 };
208
209 static const struct attribute_group soc_dev_roup = {
210 .attrs = soc_dev_attrs,
211 .is_visible = soc_dev_attr_is_visible,
212 };
213
214 static const struct attribute_group *soc_dev_attr_groups[] = {
215 &soc_dapm_dev_group,
216 &soc_dev_roup,
217 NULL
218 };
219
220 #ifdef CONFIG_DEBUG_FS
221 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
222 size_t count, loff_t *ppos)
223 {
224 ssize_t ret;
225 struct snd_soc_codec *codec = file->private_data;
226 char *buf;
227
228 if (*ppos < 0 || !count)
229 return -EINVAL;
230
231 buf = kmalloc(count, GFP_KERNEL);
232 if (!buf)
233 return -ENOMEM;
234
235 ret = soc_codec_reg_show(codec, buf, count, *ppos);
236 if (ret >= 0) {
237 if (copy_to_user(user_buf, buf, ret)) {
238 kfree(buf);
239 return -EFAULT;
240 }
241 *ppos += ret;
242 }
243
244 kfree(buf);
245 return ret;
246 }
247
248 static ssize_t codec_reg_write_file(struct file *file,
249 const char __user *user_buf, size_t count, loff_t *ppos)
250 {
251 char buf[32];
252 size_t buf_size;
253 char *start = buf;
254 unsigned long reg, value;
255 struct snd_soc_codec *codec = file->private_data;
256 int ret;
257
258 buf_size = min(count, (sizeof(buf)-1));
259 if (copy_from_user(buf, user_buf, buf_size))
260 return -EFAULT;
261 buf[buf_size] = 0;
262
263 while (*start == ' ')
264 start++;
265 reg = simple_strtoul(start, &start, 16);
266 while (*start == ' ')
267 start++;
268 ret = kstrtoul(start, 16, &value);
269 if (ret)
270 return ret;
271
272 /* Userspace has been fiddling around behind the kernel's back */
273 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
274
275 snd_soc_write(codec, reg, value);
276 return buf_size;
277 }
278
279 static const struct file_operations codec_reg_fops = {
280 .open = simple_open,
281 .read = codec_reg_read_file,
282 .write = codec_reg_write_file,
283 .llseek = default_llseek,
284 };
285
286 static void soc_init_component_debugfs(struct snd_soc_component *component)
287 {
288 if (!component->card->debugfs_card_root)
289 return;
290
291 if (component->debugfs_prefix) {
292 char *name;
293
294 name = kasprintf(GFP_KERNEL, "%s:%s",
295 component->debugfs_prefix, component->name);
296 if (name) {
297 component->debugfs_root = debugfs_create_dir(name,
298 component->card->debugfs_card_root);
299 kfree(name);
300 }
301 } else {
302 component->debugfs_root = debugfs_create_dir(component->name,
303 component->card->debugfs_card_root);
304 }
305
306 if (!component->debugfs_root) {
307 dev_warn(component->dev,
308 "ASoC: Failed to create component debugfs directory\n");
309 return;
310 }
311
312 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
313 component->debugfs_root);
314
315 if (component->init_debugfs)
316 component->init_debugfs(component);
317 }
318
319 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
320 {
321 debugfs_remove_recursive(component->debugfs_root);
322 }
323
324 static void soc_init_codec_debugfs(struct snd_soc_component *component)
325 {
326 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
327
328 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
329 codec->component.debugfs_root,
330 codec, &codec_reg_fops);
331 if (!codec->debugfs_reg)
332 dev_warn(codec->dev,
333 "ASoC: Failed to create codec register debugfs file\n");
334 }
335
336 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
337 size_t count, loff_t *ppos)
338 {
339 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
340 ssize_t len, ret = 0;
341 struct snd_soc_codec *codec;
342
343 if (!buf)
344 return -ENOMEM;
345
346 mutex_lock(&client_mutex);
347
348 list_for_each_entry(codec, &codec_list, list) {
349 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
350 codec->component.name);
351 if (len >= 0)
352 ret += len;
353 if (ret > PAGE_SIZE) {
354 ret = PAGE_SIZE;
355 break;
356 }
357 }
358
359 mutex_unlock(&client_mutex);
360
361 if (ret >= 0)
362 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
363
364 kfree(buf);
365
366 return ret;
367 }
368
369 static const struct file_operations codec_list_fops = {
370 .read = codec_list_read_file,
371 .llseek = default_llseek,/* read accesses f_pos */
372 };
373
374 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
375 size_t count, loff_t *ppos)
376 {
377 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
378 ssize_t len, ret = 0;
379 struct snd_soc_component *component;
380 struct snd_soc_dai *dai;
381
382 if (!buf)
383 return -ENOMEM;
384
385 mutex_lock(&client_mutex);
386
387 list_for_each_entry(component, &component_list, list) {
388 list_for_each_entry(dai, &component->dai_list, list) {
389 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
390 dai->name);
391 if (len >= 0)
392 ret += len;
393 if (ret > PAGE_SIZE) {
394 ret = PAGE_SIZE;
395 break;
396 }
397 }
398 }
399
400 mutex_unlock(&client_mutex);
401
402 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
403
404 kfree(buf);
405
406 return ret;
407 }
408
409 static const struct file_operations dai_list_fops = {
410 .read = dai_list_read_file,
411 .llseek = default_llseek,/* read accesses f_pos */
412 };
413
414 static ssize_t platform_list_read_file(struct file *file,
415 char __user *user_buf,
416 size_t count, loff_t *ppos)
417 {
418 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
419 ssize_t len, ret = 0;
420 struct snd_soc_platform *platform;
421
422 if (!buf)
423 return -ENOMEM;
424
425 mutex_lock(&client_mutex);
426
427 list_for_each_entry(platform, &platform_list, list) {
428 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
429 platform->component.name);
430 if (len >= 0)
431 ret += len;
432 if (ret > PAGE_SIZE) {
433 ret = PAGE_SIZE;
434 break;
435 }
436 }
437
438 mutex_unlock(&client_mutex);
439
440 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
441
442 kfree(buf);
443
444 return ret;
445 }
446
447 static const struct file_operations platform_list_fops = {
448 .read = platform_list_read_file,
449 .llseek = default_llseek,/* read accesses f_pos */
450 };
451
452 static void soc_init_card_debugfs(struct snd_soc_card *card)
453 {
454 if (!snd_soc_debugfs_root)
455 return;
456
457 card->debugfs_card_root = debugfs_create_dir(card->name,
458 snd_soc_debugfs_root);
459 if (!card->debugfs_card_root) {
460 dev_warn(card->dev,
461 "ASoC: Failed to create card debugfs directory\n");
462 return;
463 }
464
465 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
466 card->debugfs_card_root,
467 &card->pop_time);
468 if (!card->debugfs_pop_time)
469 dev_warn(card->dev,
470 "ASoC: Failed to create pop time debugfs file\n");
471 }
472
473 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
474 {
475 debugfs_remove_recursive(card->debugfs_card_root);
476 }
477
478
479 static void snd_soc_debugfs_init(void)
480 {
481 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
482 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
483 pr_warn("ASoC: Failed to create debugfs directory\n");
484 snd_soc_debugfs_root = NULL;
485 return;
486 }
487
488 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
489 &codec_list_fops))
490 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
491
492 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
493 &dai_list_fops))
494 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
495
496 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
497 &platform_list_fops))
498 pr_warn("ASoC: Failed to create platform list debugfs file\n");
499 }
500
501 static void snd_soc_debugfs_exit(void)
502 {
503 debugfs_remove_recursive(snd_soc_debugfs_root);
504 }
505
506 #else
507
508 #define soc_init_codec_debugfs NULL
509
510 static inline void soc_init_component_debugfs(
511 struct snd_soc_component *component)
512 {
513 }
514
515 static inline void soc_cleanup_component_debugfs(
516 struct snd_soc_component *component)
517 {
518 }
519
520 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
521 {
522 }
523
524 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
525 {
526 }
527
528 static inline void snd_soc_debugfs_init(void)
529 {
530 }
531
532 static inline void snd_soc_debugfs_exit(void)
533 {
534 }
535
536 #endif
537
538 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
539 const char *dai_link, int stream)
540 {
541 struct snd_soc_pcm_runtime *rtd;
542
543 list_for_each_entry(rtd, &card->rtd_list, list) {
544 if (rtd->dai_link->no_pcm &&
545 !strcmp(rtd->dai_link->name, dai_link))
546 return rtd->pcm->streams[stream].substream;
547 }
548 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
549 return NULL;
550 }
551 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
552
553 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
554 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
555 {
556 struct snd_soc_pcm_runtime *rtd;
557
558 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
559 if (!rtd)
560 return NULL;
561
562 rtd->card = card;
563 rtd->dai_link = dai_link;
564 rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
565 dai_link->num_codecs,
566 GFP_KERNEL);
567 if (!rtd->codec_dais) {
568 kfree(rtd);
569 return NULL;
570 }
571
572 return rtd;
573 }
574
575 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
576 {
577 if (rtd && rtd->codec_dais)
578 kfree(rtd->codec_dais);
579 kfree(rtd);
580 }
581
582 static void soc_add_pcm_runtime(struct snd_soc_card *card,
583 struct snd_soc_pcm_runtime *rtd)
584 {
585 list_add_tail(&rtd->list, &card->rtd_list);
586 rtd->num = card->num_rtd;
587 card->num_rtd++;
588 }
589
590 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
591 {
592 struct snd_soc_pcm_runtime *rtd, *_rtd;
593
594 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
595 list_del(&rtd->list);
596 soc_free_pcm_runtime(rtd);
597 }
598
599 card->num_rtd = 0;
600 }
601
602 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
603 const char *dai_link)
604 {
605 struct snd_soc_pcm_runtime *rtd;
606
607 list_for_each_entry(rtd, &card->rtd_list, list) {
608 if (!strcmp(rtd->dai_link->name, dai_link))
609 return rtd;
610 }
611 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
612 return NULL;
613 }
614 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
615
616 static void codec2codec_close_delayed_work(struct work_struct *work)
617 {
618 /* Currently nothing to do for c2c links
619 * Since c2c links are internal nodes in the DAPM graph and
620 * don't interface with the outside world or application layer
621 * we don't have to do any special handling on close.
622 */
623 }
624
625 #ifdef CONFIG_PM_SLEEP
626 /* powers down audio subsystem for suspend */
627 int snd_soc_suspend(struct device *dev)
628 {
629 struct snd_soc_card *card = dev_get_drvdata(dev);
630 struct snd_soc_component *component;
631 struct snd_soc_pcm_runtime *rtd;
632 int i;
633
634 /* If the card is not initialized yet there is nothing to do */
635 if (!card->instantiated)
636 return 0;
637
638 /* Due to the resume being scheduled into a workqueue we could
639 * suspend before that's finished - wait for it to complete.
640 */
641 snd_power_lock(card->snd_card);
642 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
643 snd_power_unlock(card->snd_card);
644
645 /* we're going to block userspace touching us until resume completes */
646 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
647
648 /* mute any active DACs */
649 list_for_each_entry(rtd, &card->rtd_list, list) {
650
651 if (rtd->dai_link->ignore_suspend)
652 continue;
653
654 for (i = 0; i < rtd->num_codecs; i++) {
655 struct snd_soc_dai *dai = rtd->codec_dais[i];
656 struct snd_soc_dai_driver *drv = dai->driver;
657
658 if (drv->ops->digital_mute && dai->playback_active)
659 drv->ops->digital_mute(dai, 1);
660 }
661 }
662
663 /* suspend all pcms */
664 list_for_each_entry(rtd, &card->rtd_list, list) {
665 if (rtd->dai_link->ignore_suspend)
666 continue;
667
668 snd_pcm_suspend_all(rtd->pcm);
669 }
670
671 if (card->suspend_pre)
672 card->suspend_pre(card);
673
674 list_for_each_entry(rtd, &card->rtd_list, list) {
675 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
676
677 if (rtd->dai_link->ignore_suspend)
678 continue;
679
680 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
681 cpu_dai->driver->suspend(cpu_dai);
682 }
683
684 /* close any waiting streams */
685 list_for_each_entry(rtd, &card->rtd_list, list)
686 flush_delayed_work(&rtd->delayed_work);
687
688 list_for_each_entry(rtd, &card->rtd_list, list) {
689
690 if (rtd->dai_link->ignore_suspend)
691 continue;
692
693 snd_soc_dapm_stream_event(rtd,
694 SNDRV_PCM_STREAM_PLAYBACK,
695 SND_SOC_DAPM_STREAM_SUSPEND);
696
697 snd_soc_dapm_stream_event(rtd,
698 SNDRV_PCM_STREAM_CAPTURE,
699 SND_SOC_DAPM_STREAM_SUSPEND);
700 }
701
702 /* Recheck all endpoints too, their state is affected by suspend */
703 dapm_mark_endpoints_dirty(card);
704 snd_soc_dapm_sync(&card->dapm);
705
706 /* suspend all COMPONENTs */
707 list_for_each_entry(component, &card->component_dev_list, card_list) {
708 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
709
710 /* If there are paths active then the COMPONENT will be held with
711 * bias _ON and should not be suspended. */
712 if (!component->suspended) {
713 switch (snd_soc_dapm_get_bias_level(dapm)) {
714 case SND_SOC_BIAS_STANDBY:
715 /*
716 * If the COMPONENT is capable of idle
717 * bias off then being in STANDBY
718 * means it's doing something,
719 * otherwise fall through.
720 */
721 if (dapm->idle_bias_off) {
722 dev_dbg(component->dev,
723 "ASoC: idle_bias_off CODEC on over suspend\n");
724 break;
725 }
726
727 case SND_SOC_BIAS_OFF:
728 if (component->suspend)
729 component->suspend(component);
730 component->suspended = 1;
731 if (component->regmap)
732 regcache_mark_dirty(component->regmap);
733 /* deactivate pins to sleep state */
734 pinctrl_pm_select_sleep_state(component->dev);
735 break;
736 default:
737 dev_dbg(component->dev,
738 "ASoC: COMPONENT is on over suspend\n");
739 break;
740 }
741 }
742 }
743
744 list_for_each_entry(rtd, &card->rtd_list, list) {
745 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
746
747 if (rtd->dai_link->ignore_suspend)
748 continue;
749
750 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
751 cpu_dai->driver->suspend(cpu_dai);
752
753 /* deactivate pins to sleep state */
754 pinctrl_pm_select_sleep_state(cpu_dai->dev);
755 }
756
757 if (card->suspend_post)
758 card->suspend_post(card);
759
760 return 0;
761 }
762 EXPORT_SYMBOL_GPL(snd_soc_suspend);
763
764 /* deferred resume work, so resume can complete before we finished
765 * setting our codec back up, which can be very slow on I2C
766 */
767 static void soc_resume_deferred(struct work_struct *work)
768 {
769 struct snd_soc_card *card =
770 container_of(work, struct snd_soc_card, deferred_resume_work);
771 struct snd_soc_pcm_runtime *rtd;
772 struct snd_soc_component *component;
773 int i;
774
775 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
776 * so userspace apps are blocked from touching us
777 */
778
779 dev_dbg(card->dev, "ASoC: starting resume work\n");
780
781 /* Bring us up into D2 so that DAPM starts enabling things */
782 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
783
784 if (card->resume_pre)
785 card->resume_pre(card);
786
787 /* resume control bus DAIs */
788 list_for_each_entry(rtd, &card->rtd_list, list) {
789 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
790
791 if (rtd->dai_link->ignore_suspend)
792 continue;
793
794 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
795 cpu_dai->driver->resume(cpu_dai);
796 }
797
798 list_for_each_entry(component, &card->component_dev_list, card_list) {
799 if (component->suspended) {
800 if (component->resume)
801 component->resume(component);
802 component->suspended = 0;
803 }
804 }
805
806 list_for_each_entry(rtd, &card->rtd_list, list) {
807
808 if (rtd->dai_link->ignore_suspend)
809 continue;
810
811 snd_soc_dapm_stream_event(rtd,
812 SNDRV_PCM_STREAM_PLAYBACK,
813 SND_SOC_DAPM_STREAM_RESUME);
814
815 snd_soc_dapm_stream_event(rtd,
816 SNDRV_PCM_STREAM_CAPTURE,
817 SND_SOC_DAPM_STREAM_RESUME);
818 }
819
820 /* unmute any active DACs */
821 list_for_each_entry(rtd, &card->rtd_list, list) {
822
823 if (rtd->dai_link->ignore_suspend)
824 continue;
825
826 for (i = 0; i < rtd->num_codecs; i++) {
827 struct snd_soc_dai *dai = rtd->codec_dais[i];
828 struct snd_soc_dai_driver *drv = dai->driver;
829
830 if (drv->ops->digital_mute && dai->playback_active)
831 drv->ops->digital_mute(dai, 0);
832 }
833 }
834
835 list_for_each_entry(rtd, &card->rtd_list, list) {
836 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
837
838 if (rtd->dai_link->ignore_suspend)
839 continue;
840
841 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
842 cpu_dai->driver->resume(cpu_dai);
843 }
844
845 if (card->resume_post)
846 card->resume_post(card);
847
848 dev_dbg(card->dev, "ASoC: resume work completed\n");
849
850 /* Recheck all endpoints too, their state is affected by suspend */
851 dapm_mark_endpoints_dirty(card);
852 snd_soc_dapm_sync(&card->dapm);
853
854 /* userspace can access us now we are back as we were before */
855 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
856 }
857
858 /* powers up audio subsystem after a suspend */
859 int snd_soc_resume(struct device *dev)
860 {
861 struct snd_soc_card *card = dev_get_drvdata(dev);
862 bool bus_control = false;
863 struct snd_soc_pcm_runtime *rtd;
864
865 /* If the card is not initialized yet there is nothing to do */
866 if (!card->instantiated)
867 return 0;
868
869 /* activate pins from sleep state */
870 list_for_each_entry(rtd, &card->rtd_list, list) {
871 struct snd_soc_dai **codec_dais = rtd->codec_dais;
872 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
873 int j;
874
875 if (cpu_dai->active)
876 pinctrl_pm_select_default_state(cpu_dai->dev);
877
878 for (j = 0; j < rtd->num_codecs; j++) {
879 struct snd_soc_dai *codec_dai = codec_dais[j];
880 if (codec_dai->active)
881 pinctrl_pm_select_default_state(codec_dai->dev);
882 }
883 }
884
885 /*
886 * DAIs that also act as the control bus master might have other drivers
887 * hanging off them so need to resume immediately. Other drivers don't
888 * have that problem and may take a substantial amount of time to resume
889 * due to I/O costs and anti-pop so handle them out of line.
890 */
891 list_for_each_entry(rtd, &card->rtd_list, list) {
892 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
893 bus_control |= cpu_dai->driver->bus_control;
894 }
895 if (bus_control) {
896 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
897 soc_resume_deferred(&card->deferred_resume_work);
898 } else {
899 dev_dbg(dev, "ASoC: Scheduling resume work\n");
900 if (!schedule_work(&card->deferred_resume_work))
901 dev_err(dev, "ASoC: resume work item may be lost\n");
902 }
903
904 return 0;
905 }
906 EXPORT_SYMBOL_GPL(snd_soc_resume);
907 #else
908 #define snd_soc_suspend NULL
909 #define snd_soc_resume NULL
910 #endif
911
912 static const struct snd_soc_dai_ops null_dai_ops = {
913 };
914
915 static struct snd_soc_component *soc_find_component(
916 const struct device_node *of_node, const char *name)
917 {
918 struct snd_soc_component *component;
919
920 lockdep_assert_held(&client_mutex);
921
922 list_for_each_entry(component, &component_list, list) {
923 if (of_node) {
924 if (component->dev->of_node == of_node)
925 return component;
926 } else if (strcmp(component->name, name) == 0) {
927 return component;
928 }
929 }
930
931 return NULL;
932 }
933
934 /**
935 * snd_soc_find_dai - Find a registered DAI
936 *
937 * @dlc: name of the DAI and optional component info to match
938 *
939 * This function will search all regsitered components and their DAIs to
940 * find the DAI of the same name. The component's of_node and name
941 * should also match if being specified.
942 *
943 * Return: pointer of DAI, or NULL if not found.
944 */
945 struct snd_soc_dai *snd_soc_find_dai(
946 const struct snd_soc_dai_link_component *dlc)
947 {
948 struct snd_soc_component *component;
949 struct snd_soc_dai *dai;
950 struct device_node *component_of_node;
951
952 lockdep_assert_held(&client_mutex);
953
954 /* Find CPU DAI from registered DAIs*/
955 list_for_each_entry(component, &component_list, list) {
956 component_of_node = component->dev->of_node;
957 if (!component_of_node && component->dev->parent)
958 component_of_node = component->dev->parent->of_node;
959
960 if (dlc->of_node && component_of_node != dlc->of_node)
961 continue;
962 if (dlc->name && strcmp(component->name, dlc->name))
963 continue;
964 list_for_each_entry(dai, &component->dai_list, list) {
965 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
966 continue;
967
968 return dai;
969 }
970 }
971
972 return NULL;
973 }
974 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
975
976
977 /**
978 * snd_soc_find_dai_link - Find a DAI link
979 *
980 * @card: soc card
981 * @id: DAI link ID to match
982 * @name: DAI link name to match, optional
983 * @stream name: DAI link stream name to match, optional
984 *
985 * This function will search all existing DAI links of the soc card to
986 * find the link of the same ID. Since DAI links may not have their
987 * unique ID, so name and stream name should also match if being
988 * specified.
989 *
990 * Return: pointer of DAI link, or NULL if not found.
991 */
992 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
993 int id, const char *name,
994 const char *stream_name)
995 {
996 struct snd_soc_dai_link *link, *_link;
997
998 lockdep_assert_held(&client_mutex);
999
1000 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1001 if (link->id != id)
1002 continue;
1003
1004 if (name && (!link->name || strcmp(name, link->name)))
1005 continue;
1006
1007 if (stream_name && (!link->stream_name
1008 || strcmp(stream_name, link->stream_name)))
1009 continue;
1010
1011 return link;
1012 }
1013
1014 return NULL;
1015 }
1016 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1017
1018 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1019 struct snd_soc_dai_link *dai_link)
1020 {
1021 struct snd_soc_pcm_runtime *rtd;
1022
1023 list_for_each_entry(rtd, &card->rtd_list, list) {
1024 if (rtd->dai_link == dai_link)
1025 return true;
1026 }
1027
1028 return false;
1029 }
1030
1031 static int soc_bind_dai_link(struct snd_soc_card *card,
1032 struct snd_soc_dai_link *dai_link)
1033 {
1034 struct snd_soc_pcm_runtime *rtd;
1035 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1036 struct snd_soc_dai_link_component cpu_dai_component;
1037 struct snd_soc_dai **codec_dais;
1038 struct snd_soc_platform *platform;
1039 struct device_node *platform_of_node;
1040 const char *platform_name;
1041 int i;
1042
1043 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1044
1045 if (soc_is_dai_link_bound(card, dai_link)) {
1046 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1047 dai_link->name);
1048 return 0;
1049 }
1050
1051 rtd = soc_new_pcm_runtime(card, dai_link);
1052 if (!rtd)
1053 return -ENOMEM;
1054
1055 cpu_dai_component.name = dai_link->cpu_name;
1056 cpu_dai_component.of_node = dai_link->cpu_of_node;
1057 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1058 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1059 if (!rtd->cpu_dai) {
1060 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1061 dai_link->cpu_dai_name);
1062 goto _err_defer;
1063 }
1064
1065 rtd->num_codecs = dai_link->num_codecs;
1066
1067 /* Find CODEC from registered CODECs */
1068 codec_dais = rtd->codec_dais;
1069 for (i = 0; i < rtd->num_codecs; i++) {
1070 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1071 if (!codec_dais[i]) {
1072 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1073 codecs[i].dai_name);
1074 goto _err_defer;
1075 }
1076 }
1077
1078 /* Single codec links expect codec and codec_dai in runtime data */
1079 rtd->codec_dai = codec_dais[0];
1080 rtd->codec = rtd->codec_dai->codec;
1081
1082 /* if there's no platform we match on the empty platform */
1083 platform_name = dai_link->platform_name;
1084 if (!platform_name && !dai_link->platform_of_node)
1085 platform_name = "snd-soc-dummy";
1086
1087 /* find one from the set of registered platforms */
1088 list_for_each_entry(platform, &platform_list, list) {
1089 platform_of_node = platform->dev->of_node;
1090 if (!platform_of_node && platform->dev->parent->of_node)
1091 platform_of_node = platform->dev->parent->of_node;
1092
1093 if (dai_link->platform_of_node) {
1094 if (platform_of_node != dai_link->platform_of_node)
1095 continue;
1096 } else {
1097 if (strcmp(platform->component.name, platform_name))
1098 continue;
1099 }
1100
1101 rtd->platform = platform;
1102 }
1103 if (!rtd->platform) {
1104 dev_err(card->dev, "ASoC: platform %s not registered\n",
1105 dai_link->platform_name);
1106 goto _err_defer;
1107 }
1108
1109 soc_add_pcm_runtime(card, rtd);
1110 return 0;
1111
1112 _err_defer:
1113 soc_free_pcm_runtime(rtd);
1114 return -EPROBE_DEFER;
1115 }
1116
1117 static void soc_remove_component(struct snd_soc_component *component)
1118 {
1119 if (!component->card)
1120 return;
1121
1122 list_del(&component->card_list);
1123
1124 if (component->remove)
1125 component->remove(component);
1126
1127 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1128
1129 soc_cleanup_component_debugfs(component);
1130 component->card = NULL;
1131 module_put(component->dev->driver->owner);
1132 }
1133
1134 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1135 {
1136 int err;
1137
1138 if (dai && dai->probed &&
1139 dai->driver->remove_order == order) {
1140 if (dai->driver->remove) {
1141 err = dai->driver->remove(dai);
1142 if (err < 0)
1143 dev_err(dai->dev,
1144 "ASoC: failed to remove %s: %d\n",
1145 dai->name, err);
1146 }
1147 dai->probed = 0;
1148 }
1149 }
1150
1151 static void soc_remove_link_dais(struct snd_soc_card *card,
1152 struct snd_soc_pcm_runtime *rtd, int order)
1153 {
1154 int i;
1155
1156 /* unregister the rtd device */
1157 if (rtd->dev_registered) {
1158 device_unregister(rtd->dev);
1159 rtd->dev_registered = 0;
1160 }
1161
1162 /* remove the CODEC DAI */
1163 for (i = 0; i < rtd->num_codecs; i++)
1164 soc_remove_dai(rtd->codec_dais[i], order);
1165
1166 soc_remove_dai(rtd->cpu_dai, order);
1167 }
1168
1169 static void soc_remove_link_components(struct snd_soc_card *card,
1170 struct snd_soc_pcm_runtime *rtd, int order)
1171 {
1172 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1173 struct snd_soc_platform *platform = rtd->platform;
1174 struct snd_soc_component *component;
1175 int i;
1176
1177 /* remove the platform */
1178 if (platform && platform->component.driver->remove_order == order)
1179 soc_remove_component(&platform->component);
1180
1181 /* remove the CODEC-side CODEC */
1182 for (i = 0; i < rtd->num_codecs; i++) {
1183 component = rtd->codec_dais[i]->component;
1184 if (component->driver->remove_order == order)
1185 soc_remove_component(component);
1186 }
1187
1188 /* remove any CPU-side CODEC */
1189 if (cpu_dai) {
1190 if (cpu_dai->component->driver->remove_order == order)
1191 soc_remove_component(cpu_dai->component);
1192 }
1193 }
1194
1195 static void soc_remove_dai_links(struct snd_soc_card *card)
1196 {
1197 int order;
1198 struct snd_soc_pcm_runtime *rtd;
1199 struct snd_soc_dai_link *link, *_link;
1200
1201 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1202 order++) {
1203 list_for_each_entry(rtd, &card->rtd_list, list)
1204 soc_remove_link_dais(card, rtd, order);
1205 }
1206
1207 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1208 order++) {
1209 list_for_each_entry(rtd, &card->rtd_list, list)
1210 soc_remove_link_components(card, rtd, order);
1211 }
1212
1213 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1214 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1215 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1216 link->name);
1217
1218 list_del(&link->list);
1219 card->num_dai_links--;
1220 }
1221 }
1222
1223 static int snd_soc_init_multicodec(struct snd_soc_card *card,
1224 struct snd_soc_dai_link *dai_link)
1225 {
1226 /* Legacy codec/codec_dai link is a single entry in multicodec */
1227 if (dai_link->codec_name || dai_link->codec_of_node ||
1228 dai_link->codec_dai_name) {
1229 dai_link->num_codecs = 1;
1230
1231 dai_link->codecs = devm_kzalloc(card->dev,
1232 sizeof(struct snd_soc_dai_link_component),
1233 GFP_KERNEL);
1234 if (!dai_link->codecs)
1235 return -ENOMEM;
1236
1237 dai_link->codecs[0].name = dai_link->codec_name;
1238 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1239 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1240 }
1241
1242 if (!dai_link->codecs) {
1243 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1244 return -EINVAL;
1245 }
1246
1247 return 0;
1248 }
1249
1250 static int soc_init_dai_link(struct snd_soc_card *card,
1251 struct snd_soc_dai_link *link)
1252 {
1253 int i, ret;
1254
1255 ret = snd_soc_init_multicodec(card, link);
1256 if (ret) {
1257 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1258 return ret;
1259 }
1260
1261 for (i = 0; i < link->num_codecs; i++) {
1262 /*
1263 * Codec must be specified by 1 of name or OF node,
1264 * not both or neither.
1265 */
1266 if (!!link->codecs[i].name ==
1267 !!link->codecs[i].of_node) {
1268 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1269 link->name);
1270 return -EINVAL;
1271 }
1272 /* Codec DAI name must be specified */
1273 if (!link->codecs[i].dai_name) {
1274 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1275 link->name);
1276 return -EINVAL;
1277 }
1278 }
1279
1280 /*
1281 * Platform may be specified by either name or OF node, but
1282 * can be left unspecified, and a dummy platform will be used.
1283 */
1284 if (link->platform_name && link->platform_of_node) {
1285 dev_err(card->dev,
1286 "ASoC: Both platform name/of_node are set for %s\n",
1287 link->name);
1288 return -EINVAL;
1289 }
1290
1291 /*
1292 * CPU device may be specified by either name or OF node, but
1293 * can be left unspecified, and will be matched based on DAI
1294 * name alone..
1295 */
1296 if (link->cpu_name && link->cpu_of_node) {
1297 dev_err(card->dev,
1298 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1299 link->name);
1300 return -EINVAL;
1301 }
1302 /*
1303 * At least one of CPU DAI name or CPU device name/node must be
1304 * specified
1305 */
1306 if (!link->cpu_dai_name &&
1307 !(link->cpu_name || link->cpu_of_node)) {
1308 dev_err(card->dev,
1309 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1310 link->name);
1311 return -EINVAL;
1312 }
1313
1314 return 0;
1315 }
1316
1317 /**
1318 * snd_soc_add_dai_link - Add a DAI link dynamically
1319 * @card: The ASoC card to which the DAI link is added
1320 * @dai_link: The new DAI link to add
1321 *
1322 * This function adds a DAI link to the ASoC card's link list.
1323 *
1324 * Note: Topology can use this API to add DAI links when probing the
1325 * topology component. And machine drivers can still define static
1326 * DAI links in dai_link array.
1327 */
1328 int snd_soc_add_dai_link(struct snd_soc_card *card,
1329 struct snd_soc_dai_link *dai_link)
1330 {
1331 if (dai_link->dobj.type
1332 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1333 dev_err(card->dev, "Invalid dai link type %d\n",
1334 dai_link->dobj.type);
1335 return -EINVAL;
1336 }
1337
1338 lockdep_assert_held(&client_mutex);
1339 /* Notify the machine driver for extra initialization
1340 * on the link created by topology.
1341 */
1342 if (dai_link->dobj.type && card->add_dai_link)
1343 card->add_dai_link(card, dai_link);
1344
1345 list_add_tail(&dai_link->list, &card->dai_link_list);
1346 card->num_dai_links++;
1347
1348 return 0;
1349 }
1350 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1351
1352 /**
1353 * snd_soc_remove_dai_link - Remove a DAI link from the list
1354 * @card: The ASoC card that owns the link
1355 * @dai_link: The DAI link to remove
1356 *
1357 * This function removes a DAI link from the ASoC card's link list.
1358 *
1359 * For DAI links previously added by topology, topology should
1360 * remove them by using the dobj embedded in the link.
1361 */
1362 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1363 struct snd_soc_dai_link *dai_link)
1364 {
1365 struct snd_soc_dai_link *link, *_link;
1366
1367 if (dai_link->dobj.type
1368 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1369 dev_err(card->dev, "Invalid dai link type %d\n",
1370 dai_link->dobj.type);
1371 return;
1372 }
1373
1374 lockdep_assert_held(&client_mutex);
1375 /* Notify the machine driver for extra destruction
1376 * on the link created by topology.
1377 */
1378 if (dai_link->dobj.type && card->remove_dai_link)
1379 card->remove_dai_link(card, dai_link);
1380
1381 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1382 if (link == dai_link) {
1383 list_del(&link->list);
1384 card->num_dai_links--;
1385 return;
1386 }
1387 }
1388 }
1389 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1390
1391 static void soc_set_name_prefix(struct snd_soc_card *card,
1392 struct snd_soc_component *component)
1393 {
1394 int i;
1395
1396 if (card->codec_conf == NULL)
1397 return;
1398
1399 for (i = 0; i < card->num_configs; i++) {
1400 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1401 if (map->of_node && component->dev->of_node != map->of_node)
1402 continue;
1403 if (map->dev_name && strcmp(component->name, map->dev_name))
1404 continue;
1405 component->name_prefix = map->name_prefix;
1406 break;
1407 }
1408 }
1409
1410 static int soc_probe_component(struct snd_soc_card *card,
1411 struct snd_soc_component *component)
1412 {
1413 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1414 struct snd_soc_dai *dai;
1415 int ret;
1416
1417 if (!strcmp(component->name, "snd-soc-dummy"))
1418 return 0;
1419
1420 if (component->card) {
1421 if (component->card != card) {
1422 dev_err(component->dev,
1423 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1424 card->name, component->card->name);
1425 return -ENODEV;
1426 }
1427 return 0;
1428 }
1429
1430 if (!try_module_get(component->dev->driver->owner))
1431 return -ENODEV;
1432
1433 component->card = card;
1434 dapm->card = card;
1435 soc_set_name_prefix(card, component);
1436
1437 soc_init_component_debugfs(component);
1438
1439 if (component->dapm_widgets) {
1440 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1441 component->num_dapm_widgets);
1442
1443 if (ret != 0) {
1444 dev_err(component->dev,
1445 "Failed to create new controls %d\n", ret);
1446 goto err_probe;
1447 }
1448 }
1449
1450 list_for_each_entry(dai, &component->dai_list, list) {
1451 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1452 if (ret != 0) {
1453 dev_err(component->dev,
1454 "Failed to create DAI widgets %d\n", ret);
1455 goto err_probe;
1456 }
1457 }
1458
1459 if (component->probe) {
1460 ret = component->probe(component);
1461 if (ret < 0) {
1462 dev_err(component->dev,
1463 "ASoC: failed to probe component %d\n", ret);
1464 goto err_probe;
1465 }
1466
1467 WARN(dapm->idle_bias_off &&
1468 dapm->bias_level != SND_SOC_BIAS_OFF,
1469 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1470 component->name);
1471 }
1472
1473 /* machine specific init */
1474 if (component->init) {
1475 ret = component->init(component);
1476 if (ret < 0) {
1477 dev_err(component->dev,
1478 "Failed to do machine specific init %d\n", ret);
1479 goto err_probe;
1480 }
1481 }
1482
1483 if (component->controls)
1484 snd_soc_add_component_controls(component, component->controls,
1485 component->num_controls);
1486 if (component->dapm_routes)
1487 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1488 component->num_dapm_routes);
1489
1490 list_add(&dapm->list, &card->dapm_list);
1491 list_add(&component->card_list, &card->component_dev_list);
1492
1493 return 0;
1494
1495 err_probe:
1496 soc_cleanup_component_debugfs(component);
1497 component->card = NULL;
1498 module_put(component->dev->driver->owner);
1499
1500 return ret;
1501 }
1502
1503 static void rtd_release(struct device *dev)
1504 {
1505 kfree(dev);
1506 }
1507
1508 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1509 const char *name)
1510 {
1511 int ret = 0;
1512
1513 /* register the rtd device */
1514 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1515 if (!rtd->dev)
1516 return -ENOMEM;
1517 device_initialize(rtd->dev);
1518 rtd->dev->parent = rtd->card->dev;
1519 rtd->dev->release = rtd_release;
1520 rtd->dev->groups = soc_dev_attr_groups;
1521 dev_set_name(rtd->dev, "%s", name);
1522 dev_set_drvdata(rtd->dev, rtd);
1523 mutex_init(&rtd->pcm_mutex);
1524 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1525 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1526 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1527 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1528 ret = device_add(rtd->dev);
1529 if (ret < 0) {
1530 /* calling put_device() here to free the rtd->dev */
1531 put_device(rtd->dev);
1532 dev_err(rtd->card->dev,
1533 "ASoC: failed to register runtime device: %d\n", ret);
1534 return ret;
1535 }
1536 rtd->dev_registered = 1;
1537 return 0;
1538 }
1539
1540 static int soc_probe_link_components(struct snd_soc_card *card,
1541 struct snd_soc_pcm_runtime *rtd,
1542 int order)
1543 {
1544 struct snd_soc_platform *platform = rtd->platform;
1545 struct snd_soc_component *component;
1546 int i, ret;
1547
1548 /* probe the CPU-side component, if it is a CODEC */
1549 component = rtd->cpu_dai->component;
1550 if (component->driver->probe_order == order) {
1551 ret = soc_probe_component(card, component);
1552 if (ret < 0)
1553 return ret;
1554 }
1555
1556 /* probe the CODEC-side components */
1557 for (i = 0; i < rtd->num_codecs; i++) {
1558 component = rtd->codec_dais[i]->component;
1559 if (component->driver->probe_order == order) {
1560 ret = soc_probe_component(card, component);
1561 if (ret < 0)
1562 return ret;
1563 }
1564 }
1565
1566 /* probe the platform */
1567 if (platform->component.driver->probe_order == order) {
1568 ret = soc_probe_component(card, &platform->component);
1569 if (ret < 0)
1570 return ret;
1571 }
1572
1573 return 0;
1574 }
1575
1576 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1577 {
1578 int ret;
1579
1580 if (!dai->probed && dai->driver->probe_order == order) {
1581 if (dai->driver->probe) {
1582 ret = dai->driver->probe(dai);
1583 if (ret < 0) {
1584 dev_err(dai->dev,
1585 "ASoC: failed to probe DAI %s: %d\n",
1586 dai->name, ret);
1587 return ret;
1588 }
1589 }
1590
1591 dai->probed = 1;
1592 }
1593
1594 return 0;
1595 }
1596
1597 static int soc_link_dai_widgets(struct snd_soc_card *card,
1598 struct snd_soc_dai_link *dai_link,
1599 struct snd_soc_pcm_runtime *rtd)
1600 {
1601 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1602 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1603 struct snd_soc_dapm_widget *sink, *source;
1604 int ret;
1605
1606 if (rtd->num_codecs > 1)
1607 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1608
1609 /* link the DAI widgets */
1610 sink = codec_dai->playback_widget;
1611 source = cpu_dai->capture_widget;
1612 if (sink && source) {
1613 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1614 dai_link->num_params,
1615 source, sink);
1616 if (ret != 0) {
1617 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1618 sink->name, source->name, ret);
1619 return ret;
1620 }
1621 }
1622
1623 sink = cpu_dai->playback_widget;
1624 source = codec_dai->capture_widget;
1625 if (sink && source) {
1626 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1627 dai_link->num_params,
1628 source, sink);
1629 if (ret != 0) {
1630 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1631 sink->name, source->name, ret);
1632 return ret;
1633 }
1634 }
1635
1636 return 0;
1637 }
1638
1639 static int soc_probe_link_dais(struct snd_soc_card *card,
1640 struct snd_soc_pcm_runtime *rtd, int order)
1641 {
1642 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1643 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1644 int i, ret;
1645
1646 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1647 card->name, rtd->num, order);
1648
1649 /* set default power off timeout */
1650 rtd->pmdown_time = pmdown_time;
1651
1652 ret = soc_probe_dai(cpu_dai, order);
1653 if (ret)
1654 return ret;
1655
1656 /* probe the CODEC DAI */
1657 for (i = 0; i < rtd->num_codecs; i++) {
1658 ret = soc_probe_dai(rtd->codec_dais[i], order);
1659 if (ret)
1660 return ret;
1661 }
1662
1663 /* complete DAI probe during last probe */
1664 if (order != SND_SOC_COMP_ORDER_LAST)
1665 return 0;
1666
1667 /* do machine specific initialization */
1668 if (dai_link->init) {
1669 ret = dai_link->init(rtd);
1670 if (ret < 0) {
1671 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1672 dai_link->name, ret);
1673 return ret;
1674 }
1675 }
1676
1677 if (dai_link->dai_fmt)
1678 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1679
1680 ret = soc_post_component_init(rtd, dai_link->name);
1681 if (ret)
1682 return ret;
1683
1684 #ifdef CONFIG_DEBUG_FS
1685 /* add DPCM sysfs entries */
1686 if (dai_link->dynamic)
1687 soc_dpcm_debugfs_add(rtd);
1688 #endif
1689
1690 if (cpu_dai->driver->compress_new) {
1691 /*create compress_device"*/
1692 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1693 if (ret < 0) {
1694 dev_err(card->dev, "ASoC: can't create compress %s\n",
1695 dai_link->stream_name);
1696 return ret;
1697 }
1698 } else {
1699
1700 if (!dai_link->params) {
1701 /* create the pcm */
1702 ret = soc_new_pcm(rtd, rtd->num);
1703 if (ret < 0) {
1704 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1705 dai_link->stream_name, ret);
1706 return ret;
1707 }
1708 } else {
1709 INIT_DELAYED_WORK(&rtd->delayed_work,
1710 codec2codec_close_delayed_work);
1711
1712 /* link the DAI widgets */
1713 ret = soc_link_dai_widgets(card, dai_link, rtd);
1714 if (ret)
1715 return ret;
1716 }
1717 }
1718
1719 return 0;
1720 }
1721
1722 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1723 {
1724 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1725 struct snd_soc_component *component;
1726 const char *name;
1727 struct device_node *codec_of_node;
1728
1729 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1730 /* codecs, usually analog devices */
1731 name = aux_dev->codec_name;
1732 codec_of_node = aux_dev->codec_of_node;
1733 component = soc_find_component(codec_of_node, name);
1734 if (!component) {
1735 if (codec_of_node)
1736 name = of_node_full_name(codec_of_node);
1737 goto err_defer;
1738 }
1739 } else if (aux_dev->name) {
1740 /* generic components */
1741 name = aux_dev->name;
1742 component = soc_find_component(NULL, name);
1743 if (!component)
1744 goto err_defer;
1745 } else {
1746 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1747 return -EINVAL;
1748 }
1749
1750 component->init = aux_dev->init;
1751 component->auxiliary = 1;
1752 list_add(&component->card_aux_list, &card->aux_comp_list);
1753
1754 return 0;
1755
1756 err_defer:
1757 dev_err(card->dev, "ASoC: %s not registered\n", name);
1758 return -EPROBE_DEFER;
1759 }
1760
1761 static int soc_probe_aux_devices(struct snd_soc_card *card)
1762 {
1763 struct snd_soc_component *comp, *tmp;
1764 int order;
1765 int ret;
1766
1767 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1768 order++) {
1769 list_for_each_entry_safe(comp, tmp, &card->aux_comp_list,
1770 card_aux_list) {
1771 if (comp->driver->probe_order == order) {
1772 ret = soc_probe_component(card, comp);
1773 if (ret < 0) {
1774 dev_err(card->dev,
1775 "ASoC: failed to probe aux component %s %d\n",
1776 comp->name, ret);
1777 return ret;
1778 }
1779 list_del(&comp->card_aux_list);
1780 }
1781 }
1782 }
1783
1784 return 0;
1785 }
1786
1787 static void soc_remove_aux_devices(struct snd_soc_card *card)
1788 {
1789 struct snd_soc_component *comp, *_comp;
1790 int order;
1791
1792 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1793 order++) {
1794 list_for_each_entry_safe(comp, _comp,
1795 &card->component_dev_list, card_list) {
1796
1797 if (!comp->auxiliary)
1798 continue;
1799
1800 if (comp->driver->remove_order == order) {
1801 soc_remove_component(comp);
1802 comp->auxiliary = 0;
1803 }
1804 }
1805 }
1806 }
1807
1808 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1809 {
1810 int ret;
1811
1812 if (codec->cache_init)
1813 return 0;
1814
1815 ret = snd_soc_cache_init(codec);
1816 if (ret < 0) {
1817 dev_err(codec->dev,
1818 "ASoC: Failed to set cache compression type: %d\n",
1819 ret);
1820 return ret;
1821 }
1822 codec->cache_init = 1;
1823 return 0;
1824 }
1825
1826 /**
1827 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1828 * @rtd: The runtime for which the DAI link format should be changed
1829 * @dai_fmt: The new DAI link format
1830 *
1831 * This function updates the DAI link format for all DAIs connected to the DAI
1832 * link for the specified runtime.
1833 *
1834 * Note: For setups with a static format set the dai_fmt field in the
1835 * corresponding snd_dai_link struct instead of using this function.
1836 *
1837 * Returns 0 on success, otherwise a negative error code.
1838 */
1839 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1840 unsigned int dai_fmt)
1841 {
1842 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1843 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1844 unsigned int i;
1845 int ret;
1846
1847 for (i = 0; i < rtd->num_codecs; i++) {
1848 struct snd_soc_dai *codec_dai = codec_dais[i];
1849
1850 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1851 if (ret != 0 && ret != -ENOTSUPP) {
1852 dev_warn(codec_dai->dev,
1853 "ASoC: Failed to set DAI format: %d\n", ret);
1854 return ret;
1855 }
1856 }
1857
1858 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1859 if (cpu_dai->codec) {
1860 unsigned int inv_dai_fmt;
1861
1862 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1863 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1864 case SND_SOC_DAIFMT_CBM_CFM:
1865 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1866 break;
1867 case SND_SOC_DAIFMT_CBM_CFS:
1868 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1869 break;
1870 case SND_SOC_DAIFMT_CBS_CFM:
1871 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1872 break;
1873 case SND_SOC_DAIFMT_CBS_CFS:
1874 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1875 break;
1876 }
1877
1878 dai_fmt = inv_dai_fmt;
1879 }
1880
1881 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1882 if (ret != 0 && ret != -ENOTSUPP) {
1883 dev_warn(cpu_dai->dev,
1884 "ASoC: Failed to set DAI format: %d\n", ret);
1885 return ret;
1886 }
1887
1888 return 0;
1889 }
1890 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1891
1892
1893 /* Trim special characters, and replace '-' with '_' since '-' is used to
1894 * separate different DMI fields in the card long name. Only number and
1895 * alphabet characters and a few separator characters are kept.
1896 */
1897 static void cleanup_dmi_name(char *name)
1898 {
1899 int i, j = 0;
1900
1901 for (i = 0; name[i]; i++) {
1902 if (isalnum(name[i]) || (name[i] == '.')
1903 || (name[i] == '_'))
1904 name[j++] = name[i];
1905 else if (name[i] == '-')
1906 name[j++] = '_';
1907 }
1908
1909 name[j] = '\0';
1910 }
1911
1912 /**
1913 * snd_soc_set_dmi_name() - Register DMI names to card
1914 * @card: The card to register DMI names
1915 * @flavour: The flavour "differentiator" for the card amongst its peers.
1916 *
1917 * An Intel machine driver may be used by many different devices but are
1918 * difficult for userspace to differentiate, since machine drivers ususally
1919 * use their own name as the card short name and leave the card long name
1920 * blank. To differentiate such devices and fix bugs due to lack of
1921 * device-specific configurations, this function allows DMI info to be used
1922 * as the sound card long name, in the format of
1923 * "vendor-product-version-board"
1924 * (Character '-' is used to separate different DMI fields here).
1925 * This will help the user space to load the device-specific Use Case Manager
1926 * (UCM) configurations for the card.
1927 *
1928 * Possible card long names may be:
1929 * DellInc.-XPS139343-01-0310JH
1930 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1931 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1932 *
1933 * This function also supports flavoring the card longname to provide
1934 * the extra differentiation, like "vendor-product-version-board-flavor".
1935 *
1936 * We only keep number and alphabet characters and a few separator characters
1937 * in the card long name since UCM in the user space uses the card long names
1938 * as card configuration directory names and AudoConf cannot support special
1939 * charactors like SPACE.
1940 *
1941 * Returns 0 on success, otherwise a negative error code.
1942 */
1943 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1944 {
1945 const char *vendor, *product, *product_version, *board;
1946 size_t longname_buf_size = sizeof(card->snd_card->longname);
1947 size_t len;
1948
1949 if (card->long_name)
1950 return 0; /* long name already set by driver or from DMI */
1951
1952 /* make up dmi long name as: vendor.product.version.board */
1953 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1954 if (!vendor) {
1955 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1956 return 0;
1957 }
1958
1959 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1960 "%s", vendor);
1961 cleanup_dmi_name(card->dmi_longname);
1962
1963 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1964 if (product) {
1965 len = strlen(card->dmi_longname);
1966 snprintf(card->dmi_longname + len,
1967 longname_buf_size - len,
1968 "-%s", product);
1969
1970 len++; /* skip the separator "-" */
1971 if (len < longname_buf_size)
1972 cleanup_dmi_name(card->dmi_longname + len);
1973
1974 /* some vendors like Lenovo may only put a self-explanatory
1975 * name in the product version field
1976 */
1977 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1978 if (product_version) {
1979 len = strlen(card->dmi_longname);
1980 snprintf(card->dmi_longname + len,
1981 longname_buf_size - len,
1982 "-%s", product_version);
1983
1984 len++;
1985 if (len < longname_buf_size)
1986 cleanup_dmi_name(card->dmi_longname + len);
1987 }
1988 }
1989
1990 board = dmi_get_system_info(DMI_BOARD_NAME);
1991 if (board) {
1992 len = strlen(card->dmi_longname);
1993 snprintf(card->dmi_longname + len,
1994 longname_buf_size - len,
1995 "-%s", board);
1996
1997 len++;
1998 if (len < longname_buf_size)
1999 cleanup_dmi_name(card->dmi_longname + len);
2000 } else if (!product) {
2001 /* fall back to using legacy name */
2002 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
2003 return 0;
2004 }
2005
2006 /* Add flavour to dmi long name */
2007 if (flavour) {
2008 len = strlen(card->dmi_longname);
2009 snprintf(card->dmi_longname + len,
2010 longname_buf_size - len,
2011 "-%s", flavour);
2012
2013 len++;
2014 if (len < longname_buf_size)
2015 cleanup_dmi_name(card->dmi_longname + len);
2016 }
2017
2018 /* set the card long name */
2019 card->long_name = card->dmi_longname;
2020
2021 return 0;
2022 }
2023 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
2024
2025 static int snd_soc_instantiate_card(struct snd_soc_card *card)
2026 {
2027 struct snd_soc_codec *codec;
2028 struct snd_soc_pcm_runtime *rtd;
2029 struct snd_soc_dai_link *dai_link;
2030 int ret, i, order;
2031
2032 mutex_lock(&client_mutex);
2033 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2034
2035 /* bind DAIs */
2036 for (i = 0; i < card->num_links; i++) {
2037 ret = soc_bind_dai_link(card, &card->dai_link[i]);
2038 if (ret != 0)
2039 goto base_error;
2040 }
2041
2042 /* bind aux_devs too */
2043 for (i = 0; i < card->num_aux_devs; i++) {
2044 ret = soc_bind_aux_dev(card, i);
2045 if (ret != 0)
2046 goto base_error;
2047 }
2048
2049 /* add predefined DAI links to the list */
2050 for (i = 0; i < card->num_links; i++)
2051 snd_soc_add_dai_link(card, card->dai_link+i);
2052
2053 /* initialize the register cache for each available codec */
2054 list_for_each_entry(codec, &codec_list, list) {
2055 if (codec->cache_init)
2056 continue;
2057 ret = snd_soc_init_codec_cache(codec);
2058 if (ret < 0)
2059 goto base_error;
2060 }
2061
2062 /* card bind complete so register a sound card */
2063 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2064 card->owner, 0, &card->snd_card);
2065 if (ret < 0) {
2066 dev_err(card->dev,
2067 "ASoC: can't create sound card for card %s: %d\n",
2068 card->name, ret);
2069 goto base_error;
2070 }
2071
2072 soc_init_card_debugfs(card);
2073
2074 card->dapm.bias_level = SND_SOC_BIAS_OFF;
2075 card->dapm.dev = card->dev;
2076 card->dapm.card = card;
2077 list_add(&card->dapm.list, &card->dapm_list);
2078
2079 #ifdef CONFIG_DEBUG_FS
2080 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2081 #endif
2082
2083 #ifdef CONFIG_PM_SLEEP
2084 /* deferred resume work */
2085 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2086 #endif
2087
2088 if (card->dapm_widgets)
2089 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2090 card->num_dapm_widgets);
2091
2092 if (card->of_dapm_widgets)
2093 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2094 card->num_of_dapm_widgets);
2095
2096 /* initialise the sound card only once */
2097 if (card->probe) {
2098 ret = card->probe(card);
2099 if (ret < 0)
2100 goto card_probe_error;
2101 }
2102
2103 /* probe all components used by DAI links on this card */
2104 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2105 order++) {
2106 list_for_each_entry(rtd, &card->rtd_list, list) {
2107 ret = soc_probe_link_components(card, rtd, order);
2108 if (ret < 0) {
2109 dev_err(card->dev,
2110 "ASoC: failed to instantiate card %d\n",
2111 ret);
2112 goto probe_dai_err;
2113 }
2114 }
2115 }
2116
2117 /* probe auxiliary components */
2118 ret = soc_probe_aux_devices(card);
2119 if (ret < 0)
2120 goto probe_dai_err;
2121
2122 /* Find new DAI links added during probing components and bind them.
2123 * Components with topology may bring new DAIs and DAI links.
2124 */
2125 list_for_each_entry(dai_link, &card->dai_link_list, list) {
2126 if (soc_is_dai_link_bound(card, dai_link))
2127 continue;
2128
2129 ret = soc_init_dai_link(card, dai_link);
2130 if (ret)
2131 goto probe_dai_err;
2132 ret = soc_bind_dai_link(card, dai_link);
2133 if (ret)
2134 goto probe_dai_err;
2135 }
2136
2137 /* probe all DAI links on this card */
2138 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2139 order++) {
2140 list_for_each_entry(rtd, &card->rtd_list, list) {
2141 ret = soc_probe_link_dais(card, rtd, order);
2142 if (ret < 0) {
2143 dev_err(card->dev,
2144 "ASoC: failed to instantiate card %d\n",
2145 ret);
2146 goto probe_dai_err;
2147 }
2148 }
2149 }
2150
2151 snd_soc_dapm_link_dai_widgets(card);
2152 snd_soc_dapm_connect_dai_link_widgets(card);
2153
2154 if (card->controls)
2155 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2156
2157 if (card->dapm_routes)
2158 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2159 card->num_dapm_routes);
2160
2161 if (card->of_dapm_routes)
2162 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2163 card->num_of_dapm_routes);
2164
2165 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2166 "%s", card->name);
2167 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2168 "%s", card->long_name ? card->long_name : card->name);
2169 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2170 "%s", card->driver_name ? card->driver_name : card->name);
2171 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2172 switch (card->snd_card->driver[i]) {
2173 case '_':
2174 case '-':
2175 case '\0':
2176 break;
2177 default:
2178 if (!isalnum(card->snd_card->driver[i]))
2179 card->snd_card->driver[i] = '_';
2180 break;
2181 }
2182 }
2183
2184 if (card->late_probe) {
2185 ret = card->late_probe(card);
2186 if (ret < 0) {
2187 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2188 card->name, ret);
2189 goto probe_aux_dev_err;
2190 }
2191 }
2192
2193 snd_soc_dapm_new_widgets(card);
2194
2195 ret = snd_card_register(card->snd_card);
2196 if (ret < 0) {
2197 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2198 ret);
2199 goto probe_aux_dev_err;
2200 }
2201
2202 card->instantiated = 1;
2203 snd_soc_dapm_sync(&card->dapm);
2204 mutex_unlock(&card->mutex);
2205 mutex_unlock(&client_mutex);
2206
2207 return 0;
2208
2209 probe_aux_dev_err:
2210 soc_remove_aux_devices(card);
2211
2212 probe_dai_err:
2213 soc_remove_dai_links(card);
2214
2215 card_probe_error:
2216 if (card->remove)
2217 card->remove(card);
2218
2219 snd_soc_dapm_free(&card->dapm);
2220 soc_cleanup_card_debugfs(card);
2221 snd_card_free(card->snd_card);
2222
2223 base_error:
2224 soc_remove_pcm_runtimes(card);
2225 mutex_unlock(&card->mutex);
2226 mutex_unlock(&client_mutex);
2227
2228 return ret;
2229 }
2230
2231 /* probes a new socdev */
2232 static int soc_probe(struct platform_device *pdev)
2233 {
2234 struct snd_soc_card *card = platform_get_drvdata(pdev);
2235
2236 /*
2237 * no card, so machine driver should be registering card
2238 * we should not be here in that case so ret error
2239 */
2240 if (!card)
2241 return -EINVAL;
2242
2243 dev_warn(&pdev->dev,
2244 "ASoC: machine %s should use snd_soc_register_card()\n",
2245 card->name);
2246
2247 /* Bodge while we unpick instantiation */
2248 card->dev = &pdev->dev;
2249
2250 return snd_soc_register_card(card);
2251 }
2252
2253 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2254 {
2255 struct snd_soc_pcm_runtime *rtd;
2256
2257 /* make sure any delayed work runs */
2258 list_for_each_entry(rtd, &card->rtd_list, list)
2259 flush_delayed_work(&rtd->delayed_work);
2260
2261 /* remove and free each DAI */
2262 soc_remove_dai_links(card);
2263 soc_remove_pcm_runtimes(card);
2264
2265 /* remove auxiliary devices */
2266 soc_remove_aux_devices(card);
2267
2268 snd_soc_dapm_free(&card->dapm);
2269 soc_cleanup_card_debugfs(card);
2270
2271 /* remove the card */
2272 if (card->remove)
2273 card->remove(card);
2274
2275 snd_card_free(card->snd_card);
2276 return 0;
2277
2278 }
2279
2280 /* removes a socdev */
2281 static int soc_remove(struct platform_device *pdev)
2282 {
2283 struct snd_soc_card *card = platform_get_drvdata(pdev);
2284
2285 snd_soc_unregister_card(card);
2286 return 0;
2287 }
2288
2289 int snd_soc_poweroff(struct device *dev)
2290 {
2291 struct snd_soc_card *card = dev_get_drvdata(dev);
2292 struct snd_soc_pcm_runtime *rtd;
2293
2294 if (!card->instantiated)
2295 return 0;
2296
2297 /* Flush out pmdown_time work - we actually do want to run it
2298 * now, we're shutting down so no imminent restart. */
2299 list_for_each_entry(rtd, &card->rtd_list, list)
2300 flush_delayed_work(&rtd->delayed_work);
2301
2302 snd_soc_dapm_shutdown(card);
2303
2304 /* deactivate pins to sleep state */
2305 list_for_each_entry(rtd, &card->rtd_list, list) {
2306 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2307 int i;
2308
2309 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2310 for (i = 0; i < rtd->num_codecs; i++) {
2311 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2312 pinctrl_pm_select_sleep_state(codec_dai->dev);
2313 }
2314 }
2315
2316 return 0;
2317 }
2318 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2319
2320 const struct dev_pm_ops snd_soc_pm_ops = {
2321 .suspend = snd_soc_suspend,
2322 .resume = snd_soc_resume,
2323 .freeze = snd_soc_suspend,
2324 .thaw = snd_soc_resume,
2325 .poweroff = snd_soc_poweroff,
2326 .restore = snd_soc_resume,
2327 };
2328 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2329
2330 /* ASoC platform driver */
2331 static struct platform_driver soc_driver = {
2332 .driver = {
2333 .name = "soc-audio",
2334 .pm = &snd_soc_pm_ops,
2335 },
2336 .probe = soc_probe,
2337 .remove = soc_remove,
2338 };
2339
2340 /**
2341 * snd_soc_cnew - create new control
2342 * @_template: control template
2343 * @data: control private data
2344 * @long_name: control long name
2345 * @prefix: control name prefix
2346 *
2347 * Create a new mixer control from a template control.
2348 *
2349 * Returns 0 for success, else error.
2350 */
2351 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2352 void *data, const char *long_name,
2353 const char *prefix)
2354 {
2355 struct snd_kcontrol_new template;
2356 struct snd_kcontrol *kcontrol;
2357 char *name = NULL;
2358
2359 memcpy(&template, _template, sizeof(template));
2360 template.index = 0;
2361
2362 if (!long_name)
2363 long_name = template.name;
2364
2365 if (prefix) {
2366 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2367 if (!name)
2368 return NULL;
2369
2370 template.name = name;
2371 } else {
2372 template.name = long_name;
2373 }
2374
2375 kcontrol = snd_ctl_new1(&template, data);
2376
2377 kfree(name);
2378
2379 return kcontrol;
2380 }
2381 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2382
2383 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2384 const struct snd_kcontrol_new *controls, int num_controls,
2385 const char *prefix, void *data)
2386 {
2387 int err, i;
2388
2389 for (i = 0; i < num_controls; i++) {
2390 const struct snd_kcontrol_new *control = &controls[i];
2391 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2392 control->name, prefix));
2393 if (err < 0) {
2394 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2395 control->name, err);
2396 return err;
2397 }
2398 }
2399
2400 return 0;
2401 }
2402
2403 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2404 const char *name)
2405 {
2406 struct snd_card *card = soc_card->snd_card;
2407 struct snd_kcontrol *kctl;
2408
2409 if (unlikely(!name))
2410 return NULL;
2411
2412 list_for_each_entry(kctl, &card->controls, list)
2413 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2414 return kctl;
2415 return NULL;
2416 }
2417 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2418
2419 /**
2420 * snd_soc_add_component_controls - Add an array of controls to a component.
2421 *
2422 * @component: Component to add controls to
2423 * @controls: Array of controls to add
2424 * @num_controls: Number of elements in the array
2425 *
2426 * Return: 0 for success, else error.
2427 */
2428 int snd_soc_add_component_controls(struct snd_soc_component *component,
2429 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2430 {
2431 struct snd_card *card = component->card->snd_card;
2432
2433 return snd_soc_add_controls(card, component->dev, controls,
2434 num_controls, component->name_prefix, component);
2435 }
2436 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2437
2438 /**
2439 * snd_soc_add_codec_controls - add an array of controls to a codec.
2440 * Convenience function to add a list of controls. Many codecs were
2441 * duplicating this code.
2442 *
2443 * @codec: codec to add controls to
2444 * @controls: array of controls to add
2445 * @num_controls: number of elements in the array
2446 *
2447 * Return 0 for success, else error.
2448 */
2449 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2450 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2451 {
2452 return snd_soc_add_component_controls(&codec->component, controls,
2453 num_controls);
2454 }
2455 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2456
2457 /**
2458 * snd_soc_add_platform_controls - add an array of controls to a platform.
2459 * Convenience function to add a list of controls.
2460 *
2461 * @platform: platform to add controls to
2462 * @controls: array of controls to add
2463 * @num_controls: number of elements in the array
2464 *
2465 * Return 0 for success, else error.
2466 */
2467 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2468 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2469 {
2470 return snd_soc_add_component_controls(&platform->component, controls,
2471 num_controls);
2472 }
2473 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2474
2475 /**
2476 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2477 * Convenience function to add a list of controls.
2478 *
2479 * @soc_card: SoC card to add controls to
2480 * @controls: array of controls to add
2481 * @num_controls: number of elements in the array
2482 *
2483 * Return 0 for success, else error.
2484 */
2485 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2486 const struct snd_kcontrol_new *controls, int num_controls)
2487 {
2488 struct snd_card *card = soc_card->snd_card;
2489
2490 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2491 NULL, soc_card);
2492 }
2493 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2494
2495 /**
2496 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2497 * Convienience function to add a list of controls.
2498 *
2499 * @dai: DAI to add controls to
2500 * @controls: array of controls to add
2501 * @num_controls: number of elements in the array
2502 *
2503 * Return 0 for success, else error.
2504 */
2505 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2506 const struct snd_kcontrol_new *controls, int num_controls)
2507 {
2508 struct snd_card *card = dai->component->card->snd_card;
2509
2510 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2511 NULL, dai);
2512 }
2513 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2514
2515 /**
2516 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2517 * @dai: DAI
2518 * @clk_id: DAI specific clock ID
2519 * @freq: new clock frequency in Hz
2520 * @dir: new clock direction - input/output.
2521 *
2522 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2523 */
2524 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2525 unsigned int freq, int dir)
2526 {
2527 if (dai->driver && dai->driver->ops->set_sysclk)
2528 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2529 else if (dai->codec && dai->codec->driver->set_sysclk)
2530 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2531 freq, dir);
2532 else
2533 return -ENOTSUPP;
2534 }
2535 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2536
2537 /**
2538 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2539 * @codec: CODEC
2540 * @clk_id: DAI specific clock ID
2541 * @source: Source for the clock
2542 * @freq: new clock frequency in Hz
2543 * @dir: new clock direction - input/output.
2544 *
2545 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2546 */
2547 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2548 int source, unsigned int freq, int dir)
2549 {
2550 if (codec->driver->set_sysclk)
2551 return codec->driver->set_sysclk(codec, clk_id, source,
2552 freq, dir);
2553 else
2554 return -ENOTSUPP;
2555 }
2556 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2557
2558 /**
2559 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2560 * @dai: DAI
2561 * @div_id: DAI specific clock divider ID
2562 * @div: new clock divisor.
2563 *
2564 * Configures the clock dividers. This is used to derive the best DAI bit and
2565 * frame clocks from the system or master clock. It's best to set the DAI bit
2566 * and frame clocks as low as possible to save system power.
2567 */
2568 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2569 int div_id, int div)
2570 {
2571 if (dai->driver && dai->driver->ops->set_clkdiv)
2572 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2573 else
2574 return -EINVAL;
2575 }
2576 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2577
2578 /**
2579 * snd_soc_dai_set_pll - configure DAI PLL.
2580 * @dai: DAI
2581 * @pll_id: DAI specific PLL ID
2582 * @source: DAI specific source for the PLL
2583 * @freq_in: PLL input clock frequency in Hz
2584 * @freq_out: requested PLL output clock frequency in Hz
2585 *
2586 * Configures and enables PLL to generate output clock based on input clock.
2587 */
2588 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2589 unsigned int freq_in, unsigned int freq_out)
2590 {
2591 if (dai->driver && dai->driver->ops->set_pll)
2592 return dai->driver->ops->set_pll(dai, pll_id, source,
2593 freq_in, freq_out);
2594 else if (dai->codec && dai->codec->driver->set_pll)
2595 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2596 freq_in, freq_out);
2597 else
2598 return -EINVAL;
2599 }
2600 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2601
2602 /*
2603 * snd_soc_codec_set_pll - configure codec PLL.
2604 * @codec: CODEC
2605 * @pll_id: DAI specific PLL ID
2606 * @source: DAI specific source for the PLL
2607 * @freq_in: PLL input clock frequency in Hz
2608 * @freq_out: requested PLL output clock frequency in Hz
2609 *
2610 * Configures and enables PLL to generate output clock based on input clock.
2611 */
2612 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2613 unsigned int freq_in, unsigned int freq_out)
2614 {
2615 if (codec->driver->set_pll)
2616 return codec->driver->set_pll(codec, pll_id, source,
2617 freq_in, freq_out);
2618 else
2619 return -EINVAL;
2620 }
2621 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2622
2623 /**
2624 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2625 * @dai: DAI
2626 * @ratio: Ratio of BCLK to Sample rate.
2627 *
2628 * Configures the DAI for a preset BCLK to sample rate ratio.
2629 */
2630 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2631 {
2632 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2633 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2634 else
2635 return -EINVAL;
2636 }
2637 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2638
2639 /**
2640 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2641 * @dai: DAI
2642 * @fmt: SND_SOC_DAIFMT_ format value.
2643 *
2644 * Configures the DAI hardware format and clocking.
2645 */
2646 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2647 {
2648 if (dai->driver == NULL)
2649 return -EINVAL;
2650 if (dai->driver->ops->set_fmt == NULL)
2651 return -ENOTSUPP;
2652 return dai->driver->ops->set_fmt(dai, fmt);
2653 }
2654 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2655
2656 /**
2657 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2658 * @slots: Number of slots in use.
2659 * @tx_mask: bitmask representing active TX slots.
2660 * @rx_mask: bitmask representing active RX slots.
2661 *
2662 * Generates the TDM tx and rx slot default masks for DAI.
2663 */
2664 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2665 unsigned int *tx_mask,
2666 unsigned int *rx_mask)
2667 {
2668 if (*tx_mask || *rx_mask)
2669 return 0;
2670
2671 if (!slots)
2672 return -EINVAL;
2673
2674 *tx_mask = (1 << slots) - 1;
2675 *rx_mask = (1 << slots) - 1;
2676
2677 return 0;
2678 }
2679
2680 /**
2681 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2682 * @dai: The DAI to configure
2683 * @tx_mask: bitmask representing active TX slots.
2684 * @rx_mask: bitmask representing active RX slots.
2685 * @slots: Number of slots in use.
2686 * @slot_width: Width in bits for each slot.
2687 *
2688 * This function configures the specified DAI for TDM operation. @slot contains
2689 * the total number of slots of the TDM stream and @slot_with the width of each
2690 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2691 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2692 * DAI should write to or read from. If a bit is set the corresponding slot is
2693 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2694 * the first slot, bit 1 to the second slot and so on. The first active slot
2695 * maps to the first channel of the DAI, the second active slot to the second
2696 * channel and so on.
2697 *
2698 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2699 * @rx_mask and @slot_width will be ignored.
2700 *
2701 * Returns 0 on success, a negative error code otherwise.
2702 */
2703 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2704 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2705 {
2706 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2707 dai->driver->ops->xlate_tdm_slot_mask(slots,
2708 &tx_mask, &rx_mask);
2709 else
2710 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2711
2712 dai->tx_mask = tx_mask;
2713 dai->rx_mask = rx_mask;
2714
2715 if (dai->driver && dai->driver->ops->set_tdm_slot)
2716 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2717 slots, slot_width);
2718 else
2719 return -ENOTSUPP;
2720 }
2721 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2722
2723 /**
2724 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2725 * @dai: DAI
2726 * @tx_num: how many TX channels
2727 * @tx_slot: pointer to an array which imply the TX slot number channel
2728 * 0~num-1 uses
2729 * @rx_num: how many RX channels
2730 * @rx_slot: pointer to an array which imply the RX slot number channel
2731 * 0~num-1 uses
2732 *
2733 * configure the relationship between channel number and TDM slot number.
2734 */
2735 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2736 unsigned int tx_num, unsigned int *tx_slot,
2737 unsigned int rx_num, unsigned int *rx_slot)
2738 {
2739 if (dai->driver && dai->driver->ops->set_channel_map)
2740 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2741 rx_num, rx_slot);
2742 else
2743 return -EINVAL;
2744 }
2745 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2746
2747 /**
2748 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2749 * @dai: DAI
2750 * @tristate: tristate enable
2751 *
2752 * Tristates the DAI so that others can use it.
2753 */
2754 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2755 {
2756 if (dai->driver && dai->driver->ops->set_tristate)
2757 return dai->driver->ops->set_tristate(dai, tristate);
2758 else
2759 return -EINVAL;
2760 }
2761 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2762
2763 /**
2764 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2765 * @dai: DAI
2766 * @mute: mute enable
2767 * @direction: stream to mute
2768 *
2769 * Mutes the DAI DAC.
2770 */
2771 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2772 int direction)
2773 {
2774 if (!dai->driver)
2775 return -ENOTSUPP;
2776
2777 if (dai->driver->ops->mute_stream)
2778 return dai->driver->ops->mute_stream(dai, mute, direction);
2779 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2780 dai->driver->ops->digital_mute)
2781 return dai->driver->ops->digital_mute(dai, mute);
2782 else
2783 return -ENOTSUPP;
2784 }
2785 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2786
2787 /**
2788 * snd_soc_register_card - Register a card with the ASoC core
2789 *
2790 * @card: Card to register
2791 *
2792 */
2793 int snd_soc_register_card(struct snd_soc_card *card)
2794 {
2795 int i, ret;
2796 struct snd_soc_pcm_runtime *rtd;
2797
2798 if (!card->name || !card->dev)
2799 return -EINVAL;
2800
2801 for (i = 0; i < card->num_links; i++) {
2802 struct snd_soc_dai_link *link = &card->dai_link[i];
2803
2804 ret = soc_init_dai_link(card, link);
2805 if (ret) {
2806 dev_err(card->dev, "ASoC: failed to init link %s\n",
2807 link->name);
2808 return ret;
2809 }
2810 }
2811
2812 dev_set_drvdata(card->dev, card);
2813
2814 snd_soc_initialize_card_lists(card);
2815
2816 INIT_LIST_HEAD(&card->dai_link_list);
2817 card->num_dai_links = 0;
2818
2819 INIT_LIST_HEAD(&card->rtd_list);
2820 card->num_rtd = 0;
2821
2822 INIT_LIST_HEAD(&card->dapm_dirty);
2823 INIT_LIST_HEAD(&card->dobj_list);
2824 card->instantiated = 0;
2825 mutex_init(&card->mutex);
2826 mutex_init(&card->dapm_mutex);
2827
2828 ret = snd_soc_instantiate_card(card);
2829 if (ret != 0)
2830 return ret;
2831
2832 /* deactivate pins to sleep state */
2833 list_for_each_entry(rtd, &card->rtd_list, list) {
2834 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2835 int j;
2836
2837 for (j = 0; j < rtd->num_codecs; j++) {
2838 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2839 if (!codec_dai->active)
2840 pinctrl_pm_select_sleep_state(codec_dai->dev);
2841 }
2842
2843 if (!cpu_dai->active)
2844 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2845 }
2846
2847 return ret;
2848 }
2849 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2850
2851 /**
2852 * snd_soc_unregister_card - Unregister a card with the ASoC core
2853 *
2854 * @card: Card to unregister
2855 *
2856 */
2857 int snd_soc_unregister_card(struct snd_soc_card *card)
2858 {
2859 if (card->instantiated) {
2860 card->instantiated = false;
2861 snd_soc_dapm_shutdown(card);
2862 soc_cleanup_card_resources(card);
2863 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2864 }
2865
2866 return 0;
2867 }
2868 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2869
2870 /*
2871 * Simplify DAI link configuration by removing ".-1" from device names
2872 * and sanitizing names.
2873 */
2874 static char *fmt_single_name(struct device *dev, int *id)
2875 {
2876 char *found, name[NAME_SIZE];
2877 int id1, id2;
2878
2879 if (dev_name(dev) == NULL)
2880 return NULL;
2881
2882 strlcpy(name, dev_name(dev), NAME_SIZE);
2883
2884 /* are we a "%s.%d" name (platform and SPI components) */
2885 found = strstr(name, dev->driver->name);
2886 if (found) {
2887 /* get ID */
2888 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2889
2890 /* discard ID from name if ID == -1 */
2891 if (*id == -1)
2892 found[strlen(dev->driver->name)] = '\0';
2893 }
2894
2895 } else {
2896 /* I2C component devices are named "bus-addr" */
2897 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2898 char tmp[NAME_SIZE];
2899
2900 /* create unique ID number from I2C addr and bus */
2901 *id = ((id1 & 0xffff) << 16) + id2;
2902
2903 /* sanitize component name for DAI link creation */
2904 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2905 strlcpy(name, tmp, NAME_SIZE);
2906 } else
2907 *id = 0;
2908 }
2909
2910 return kstrdup(name, GFP_KERNEL);
2911 }
2912
2913 /*
2914 * Simplify DAI link naming for single devices with multiple DAIs by removing
2915 * any ".-1" and using the DAI name (instead of device name).
2916 */
2917 static inline char *fmt_multiple_name(struct device *dev,
2918 struct snd_soc_dai_driver *dai_drv)
2919 {
2920 if (dai_drv->name == NULL) {
2921 dev_err(dev,
2922 "ASoC: error - multiple DAI %s registered with no name\n",
2923 dev_name(dev));
2924 return NULL;
2925 }
2926
2927 return kstrdup(dai_drv->name, GFP_KERNEL);
2928 }
2929
2930 /**
2931 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2932 *
2933 * @component: The component for which the DAIs should be unregistered
2934 */
2935 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2936 {
2937 struct snd_soc_dai *dai, *_dai;
2938
2939 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2940 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2941 dai->name);
2942 list_del(&dai->list);
2943 kfree(dai->name);
2944 kfree(dai);
2945 }
2946 }
2947
2948 /* Create a DAI and add it to the component's DAI list */
2949 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2950 struct snd_soc_dai_driver *dai_drv,
2951 bool legacy_dai_naming)
2952 {
2953 struct device *dev = component->dev;
2954 struct snd_soc_dai *dai;
2955
2956 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2957
2958 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2959 if (dai == NULL)
2960 return NULL;
2961
2962 /*
2963 * Back in the old days when we still had component-less DAIs,
2964 * instead of having a static name, component-less DAIs would
2965 * inherit the name of the parent device so it is possible to
2966 * register multiple instances of the DAI. We still need to keep
2967 * the same naming style even though those DAIs are not
2968 * component-less anymore.
2969 */
2970 if (legacy_dai_naming &&
2971 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2972 dai->name = fmt_single_name(dev, &dai->id);
2973 } else {
2974 dai->name = fmt_multiple_name(dev, dai_drv);
2975 if (dai_drv->id)
2976 dai->id = dai_drv->id;
2977 else
2978 dai->id = component->num_dai;
2979 }
2980 if (dai->name == NULL) {
2981 kfree(dai);
2982 return NULL;
2983 }
2984
2985 dai->component = component;
2986 dai->dev = dev;
2987 dai->driver = dai_drv;
2988 if (!dai->driver->ops)
2989 dai->driver->ops = &null_dai_ops;
2990
2991 list_add(&dai->list, &component->dai_list);
2992 component->num_dai++;
2993
2994 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2995 return dai;
2996 }
2997
2998 /**
2999 * snd_soc_register_dais - Register a DAI with the ASoC core
3000 *
3001 * @component: The component the DAIs are registered for
3002 * @dai_drv: DAI driver to use for the DAIs
3003 * @count: Number of DAIs
3004 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
3005 * parent's name.
3006 */
3007 static int snd_soc_register_dais(struct snd_soc_component *component,
3008 struct snd_soc_dai_driver *dai_drv, size_t count,
3009 bool legacy_dai_naming)
3010 {
3011 struct device *dev = component->dev;
3012 struct snd_soc_dai *dai;
3013 unsigned int i;
3014 int ret;
3015
3016 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
3017
3018 component->dai_drv = dai_drv;
3019
3020 for (i = 0; i < count; i++) {
3021
3022 dai = soc_add_dai(component, dai_drv + i,
3023 count == 1 && legacy_dai_naming);
3024 if (dai == NULL) {
3025 ret = -ENOMEM;
3026 goto err;
3027 }
3028 }
3029
3030 return 0;
3031
3032 err:
3033 snd_soc_unregister_dais(component);
3034
3035 return ret;
3036 }
3037
3038 /**
3039 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
3040 *
3041 * @component: The component the DAIs are registered for
3042 * @dai_drv: DAI driver to use for the DAI
3043 *
3044 * Topology can use this API to register DAIs when probing a component.
3045 * These DAIs's widgets will be freed in the card cleanup and the DAIs
3046 * will be freed in the component cleanup.
3047 */
3048 int snd_soc_register_dai(struct snd_soc_component *component,
3049 struct snd_soc_dai_driver *dai_drv)
3050 {
3051 struct snd_soc_dapm_context *dapm =
3052 snd_soc_component_get_dapm(component);
3053 struct snd_soc_dai *dai;
3054 int ret;
3055
3056 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
3057 dev_err(component->dev, "Invalid dai type %d\n",
3058 dai_drv->dobj.type);
3059 return -EINVAL;
3060 }
3061
3062 lockdep_assert_held(&client_mutex);
3063 dai = soc_add_dai(component, dai_drv, false);
3064 if (!dai)
3065 return -ENOMEM;
3066
3067 /* Create the DAI widgets here. After adding DAIs, topology may
3068 * also add routes that need these widgets as source or sink.
3069 */
3070 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
3071 if (ret != 0) {
3072 dev_err(component->dev,
3073 "Failed to create DAI widgets %d\n", ret);
3074 }
3075
3076 return ret;
3077 }
3078 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3079
3080 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
3081 enum snd_soc_dapm_type type, int subseq)
3082 {
3083 struct snd_soc_component *component = dapm->component;
3084
3085 component->driver->seq_notifier(component, type, subseq);
3086 }
3087
3088 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3089 int event)
3090 {
3091 struct snd_soc_component *component = dapm->component;
3092
3093 return component->driver->stream_event(component, event);
3094 }
3095
3096 static int snd_soc_component_initialize(struct snd_soc_component *component,
3097 const struct snd_soc_component_driver *driver, struct device *dev)
3098 {
3099 struct snd_soc_dapm_context *dapm;
3100
3101 component->name = fmt_single_name(dev, &component->id);
3102 if (!component->name) {
3103 dev_err(dev, "ASoC: Failed to allocate name\n");
3104 return -ENOMEM;
3105 }
3106
3107 component->dev = dev;
3108 component->driver = driver;
3109 component->probe = component->driver->probe;
3110 component->remove = component->driver->remove;
3111 component->suspend = component->driver->suspend;
3112 component->resume = component->driver->resume;
3113 component->pcm_new = component->driver->pcm_new;
3114 component->pcm_free= component->driver->pcm_free;
3115
3116 dapm = &component->dapm;
3117 dapm->dev = dev;
3118 dapm->component = component;
3119 dapm->bias_level = SND_SOC_BIAS_OFF;
3120 dapm->idle_bias_off = true;
3121 if (driver->seq_notifier)
3122 dapm->seq_notifier = snd_soc_component_seq_notifier;
3123 if (driver->stream_event)
3124 dapm->stream_event = snd_soc_component_stream_event;
3125
3126 component->controls = driver->controls;
3127 component->num_controls = driver->num_controls;
3128 component->dapm_widgets = driver->dapm_widgets;
3129 component->num_dapm_widgets = driver->num_dapm_widgets;
3130 component->dapm_routes = driver->dapm_routes;
3131 component->num_dapm_routes = driver->num_dapm_routes;
3132
3133 INIT_LIST_HEAD(&component->dai_list);
3134 mutex_init(&component->io_mutex);
3135
3136 return 0;
3137 }
3138
3139 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3140 {
3141 int val_bytes = regmap_get_val_bytes(component->regmap);
3142
3143 /* Errors are legitimate for non-integer byte multiples */
3144 if (val_bytes > 0)
3145 component->val_bytes = val_bytes;
3146 }
3147
3148 #ifdef CONFIG_REGMAP
3149
3150 /**
3151 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3152 * @component: The component for which to initialize the regmap instance
3153 * @regmap: The regmap instance that should be used by the component
3154 *
3155 * This function allows deferred assignment of the regmap instance that is
3156 * associated with the component. Only use this if the regmap instance is not
3157 * yet ready when the component is registered. The function must also be called
3158 * before the first IO attempt of the component.
3159 */
3160 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3161 struct regmap *regmap)
3162 {
3163 component->regmap = regmap;
3164 snd_soc_component_setup_regmap(component);
3165 }
3166 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3167
3168 /**
3169 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3170 * @component: The component for which to de-initialize the regmap instance
3171 *
3172 * Calls regmap_exit() on the regmap instance associated to the component and
3173 * removes the regmap instance from the component.
3174 *
3175 * This function should only be used if snd_soc_component_init_regmap() was used
3176 * to initialize the regmap instance.
3177 */
3178 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3179 {
3180 regmap_exit(component->regmap);
3181 component->regmap = NULL;
3182 }
3183 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3184
3185 #endif
3186
3187 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3188 {
3189 if (!component->write && !component->read) {
3190 if (!component->regmap)
3191 component->regmap = dev_get_regmap(component->dev, NULL);
3192 if (component->regmap)
3193 snd_soc_component_setup_regmap(component);
3194 }
3195
3196 list_add(&component->list, &component_list);
3197 INIT_LIST_HEAD(&component->dobj_list);
3198 }
3199
3200 static void snd_soc_component_add(struct snd_soc_component *component)
3201 {
3202 mutex_lock(&client_mutex);
3203 snd_soc_component_add_unlocked(component);
3204 mutex_unlock(&client_mutex);
3205 }
3206
3207 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3208 {
3209 snd_soc_unregister_dais(component);
3210 kfree(component->name);
3211 }
3212
3213 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3214 {
3215 list_del(&component->list);
3216 }
3217
3218 int snd_soc_register_component(struct device *dev,
3219 const struct snd_soc_component_driver *cmpnt_drv,
3220 struct snd_soc_dai_driver *dai_drv,
3221 int num_dai)
3222 {
3223 struct snd_soc_component *cmpnt;
3224 int ret;
3225
3226 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
3227 if (!cmpnt) {
3228 dev_err(dev, "ASoC: Failed to allocate memory\n");
3229 return -ENOMEM;
3230 }
3231
3232 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
3233 if (ret)
3234 goto err_free;
3235
3236 cmpnt->ignore_pmdown_time = true;
3237 cmpnt->registered_as_component = true;
3238
3239 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
3240 if (ret < 0) {
3241 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3242 goto err_cleanup;
3243 }
3244
3245 snd_soc_component_add(cmpnt);
3246
3247 return 0;
3248
3249 err_cleanup:
3250 snd_soc_component_cleanup(cmpnt);
3251 err_free:
3252 kfree(cmpnt);
3253 return ret;
3254 }
3255 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3256
3257 /**
3258 * snd_soc_unregister_component - Unregister a component from the ASoC core
3259 *
3260 * @dev: The device to unregister
3261 */
3262 void snd_soc_unregister_component(struct device *dev)
3263 {
3264 struct snd_soc_component *cmpnt;
3265
3266 mutex_lock(&client_mutex);
3267 list_for_each_entry(cmpnt, &component_list, list) {
3268 if (dev == cmpnt->dev && cmpnt->registered_as_component)
3269 goto found;
3270 }
3271 mutex_unlock(&client_mutex);
3272 return;
3273
3274 found:
3275 snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
3276 snd_soc_component_del_unlocked(cmpnt);
3277 mutex_unlock(&client_mutex);
3278 snd_soc_component_cleanup(cmpnt);
3279 kfree(cmpnt);
3280 }
3281 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3282
3283 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3284 {
3285 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3286
3287 return platform->driver->probe(platform);
3288 }
3289
3290 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3291 {
3292 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3293
3294 platform->driver->remove(platform);
3295 }
3296
3297 static int snd_soc_platform_drv_pcm_new(struct snd_soc_pcm_runtime *rtd)
3298 {
3299 struct snd_soc_platform *platform = rtd->platform;
3300
3301 return platform->driver->pcm_new(rtd);
3302 }
3303
3304 static void snd_soc_platform_drv_pcm_free(struct snd_pcm *pcm)
3305 {
3306 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
3307 struct snd_soc_platform *platform = rtd->platform;
3308
3309 platform->driver->pcm_free(pcm);
3310 }
3311
3312 /**
3313 * snd_soc_add_platform - Add a platform to the ASoC core
3314 * @dev: The parent device for the platform
3315 * @platform: The platform to add
3316 * @platform_drv: The driver for the platform
3317 */
3318 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3319 const struct snd_soc_platform_driver *platform_drv)
3320 {
3321 int ret;
3322
3323 ret = snd_soc_component_initialize(&platform->component,
3324 &platform_drv->component_driver, dev);
3325 if (ret)
3326 return ret;
3327
3328 platform->dev = dev;
3329 platform->driver = platform_drv;
3330
3331 if (platform_drv->probe)
3332 platform->component.probe = snd_soc_platform_drv_probe;
3333 if (platform_drv->remove)
3334 platform->component.remove = snd_soc_platform_drv_remove;
3335 if (platform_drv->pcm_new)
3336 platform->component.pcm_new = snd_soc_platform_drv_pcm_new;
3337 if (platform_drv->pcm_free)
3338 platform->component.pcm_free = snd_soc_platform_drv_pcm_free;
3339
3340 #ifdef CONFIG_DEBUG_FS
3341 platform->component.debugfs_prefix = "platform";
3342 #endif
3343
3344 mutex_lock(&client_mutex);
3345 snd_soc_component_add_unlocked(&platform->component);
3346 list_add(&platform->list, &platform_list);
3347 mutex_unlock(&client_mutex);
3348
3349 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3350 platform->component.name);
3351
3352 return 0;
3353 }
3354 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3355
3356 /**
3357 * snd_soc_register_platform - Register a platform with the ASoC core
3358 *
3359 * @dev: The device for the platform
3360 * @platform_drv: The driver for the platform
3361 */
3362 int snd_soc_register_platform(struct device *dev,
3363 const struct snd_soc_platform_driver *platform_drv)
3364 {
3365 struct snd_soc_platform *platform;
3366 int ret;
3367
3368 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3369
3370 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3371 if (platform == NULL)
3372 return -ENOMEM;
3373
3374 ret = snd_soc_add_platform(dev, platform, platform_drv);
3375 if (ret)
3376 kfree(platform);
3377
3378 return ret;
3379 }
3380 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3381
3382 /**
3383 * snd_soc_remove_platform - Remove a platform from the ASoC core
3384 * @platform: the platform to remove
3385 */
3386 void snd_soc_remove_platform(struct snd_soc_platform *platform)
3387 {
3388
3389 mutex_lock(&client_mutex);
3390 list_del(&platform->list);
3391 snd_soc_component_del_unlocked(&platform->component);
3392 mutex_unlock(&client_mutex);
3393
3394 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3395 platform->component.name);
3396
3397 snd_soc_component_cleanup(&platform->component);
3398 }
3399 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3400
3401 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3402 {
3403 struct snd_soc_platform *platform;
3404
3405 mutex_lock(&client_mutex);
3406 list_for_each_entry(platform, &platform_list, list) {
3407 if (dev == platform->dev) {
3408 mutex_unlock(&client_mutex);
3409 return platform;
3410 }
3411 }
3412 mutex_unlock(&client_mutex);
3413
3414 return NULL;
3415 }
3416 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3417
3418 /**
3419 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3420 *
3421 * @dev: platform to unregister
3422 */
3423 void snd_soc_unregister_platform(struct device *dev)
3424 {
3425 struct snd_soc_platform *platform;
3426
3427 platform = snd_soc_lookup_platform(dev);
3428 if (!platform)
3429 return;
3430
3431 snd_soc_remove_platform(platform);
3432 kfree(platform);
3433 }
3434 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3435
3436 static u64 codec_format_map[] = {
3437 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
3438 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
3439 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
3440 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
3441 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
3442 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
3443 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3444 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
3445 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
3446 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
3447 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
3448 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
3449 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
3450 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
3451 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
3452 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
3453 };
3454
3455 /* Fix up the DAI formats for endianness: codecs don't actually see
3456 * the endianness of the data but we're using the CPU format
3457 * definitions which do need to include endianness so we ensure that
3458 * codec DAIs always have both big and little endian variants set.
3459 */
3460 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
3461 {
3462 int i;
3463
3464 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
3465 if (stream->formats & codec_format_map[i])
3466 stream->formats |= codec_format_map[i];
3467 }
3468
3469 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3470 {
3471 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3472
3473 return codec->driver->probe(codec);
3474 }
3475
3476 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3477 {
3478 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3479
3480 codec->driver->remove(codec);
3481 }
3482
3483 static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
3484 {
3485 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3486
3487 return codec->driver->suspend(codec);
3488 }
3489
3490 static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
3491 {
3492 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3493
3494 return codec->driver->resume(codec);
3495 }
3496
3497 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3498 unsigned int reg, unsigned int val)
3499 {
3500 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3501
3502 return codec->driver->write(codec, reg, val);
3503 }
3504
3505 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3506 unsigned int reg, unsigned int *val)
3507 {
3508 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3509
3510 *val = codec->driver->read(codec, reg);
3511
3512 return 0;
3513 }
3514
3515 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3516 enum snd_soc_bias_level level)
3517 {
3518 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3519
3520 return codec->driver->set_bias_level(codec, level);
3521 }
3522
3523 /**
3524 * snd_soc_register_codec - Register a codec with the ASoC core
3525 *
3526 * @dev: The parent device for this codec
3527 * @codec_drv: Codec driver
3528 * @dai_drv: The associated DAI driver
3529 * @num_dai: Number of DAIs
3530 */
3531 int snd_soc_register_codec(struct device *dev,
3532 const struct snd_soc_codec_driver *codec_drv,
3533 struct snd_soc_dai_driver *dai_drv,
3534 int num_dai)
3535 {
3536 struct snd_soc_dapm_context *dapm;
3537 struct snd_soc_codec *codec;
3538 struct snd_soc_dai *dai;
3539 int ret, i;
3540
3541 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3542
3543 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3544 if (codec == NULL)
3545 return -ENOMEM;
3546
3547 codec->component.codec = codec;
3548
3549 ret = snd_soc_component_initialize(&codec->component,
3550 &codec_drv->component_driver, dev);
3551 if (ret)
3552 goto err_free;
3553
3554 if (codec_drv->probe)
3555 codec->component.probe = snd_soc_codec_drv_probe;
3556 if (codec_drv->remove)
3557 codec->component.remove = snd_soc_codec_drv_remove;
3558 if (codec_drv->suspend)
3559 codec->component.suspend = snd_soc_codec_drv_suspend;
3560 if (codec_drv->resume)
3561 codec->component.resume = snd_soc_codec_drv_resume;
3562 if (codec_drv->write)
3563 codec->component.write = snd_soc_codec_drv_write;
3564 if (codec_drv->read)
3565 codec->component.read = snd_soc_codec_drv_read;
3566 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3567
3568 dapm = snd_soc_codec_get_dapm(codec);
3569 dapm->idle_bias_off = codec_drv->idle_bias_off;
3570 dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3571 if (codec_drv->seq_notifier)
3572 dapm->seq_notifier = codec_drv->seq_notifier;
3573 if (codec_drv->set_bias_level)
3574 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3575 codec->dev = dev;
3576 codec->driver = codec_drv;
3577 codec->component.val_bytes = codec_drv->reg_word_size;
3578
3579 #ifdef CONFIG_DEBUG_FS
3580 codec->component.init_debugfs = soc_init_codec_debugfs;
3581 codec->component.debugfs_prefix = "codec";
3582 #endif
3583
3584 if (codec_drv->get_regmap)
3585 codec->component.regmap = codec_drv->get_regmap(dev);
3586
3587 for (i = 0; i < num_dai; i++) {
3588 fixup_codec_formats(&dai_drv[i].playback);
3589 fixup_codec_formats(&dai_drv[i].capture);
3590 }
3591
3592 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3593 if (ret < 0) {
3594 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3595 goto err_cleanup;
3596 }
3597
3598 list_for_each_entry(dai, &codec->component.dai_list, list)
3599 dai->codec = codec;
3600
3601 mutex_lock(&client_mutex);
3602 snd_soc_component_add_unlocked(&codec->component);
3603 list_add(&codec->list, &codec_list);
3604 mutex_unlock(&client_mutex);
3605
3606 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3607 codec->component.name);
3608 return 0;
3609
3610 err_cleanup:
3611 snd_soc_component_cleanup(&codec->component);
3612 err_free:
3613 kfree(codec);
3614 return ret;
3615 }
3616 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3617
3618 /**
3619 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3620 *
3621 * @dev: codec to unregister
3622 */
3623 void snd_soc_unregister_codec(struct device *dev)
3624 {
3625 struct snd_soc_codec *codec;
3626
3627 mutex_lock(&client_mutex);
3628 list_for_each_entry(codec, &codec_list, list) {
3629 if (dev == codec->dev)
3630 goto found;
3631 }
3632 mutex_unlock(&client_mutex);
3633 return;
3634
3635 found:
3636 list_del(&codec->list);
3637 snd_soc_component_del_unlocked(&codec->component);
3638 mutex_unlock(&client_mutex);
3639
3640 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3641 codec->component.name);
3642
3643 snd_soc_component_cleanup(&codec->component);
3644 snd_soc_cache_exit(codec);
3645 kfree(codec);
3646 }
3647 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3648
3649 /* Retrieve a card's name from device tree */
3650 int snd_soc_of_parse_card_name_from_node(struct snd_soc_card *card,
3651 struct device_node *np,
3652 const char *propname)
3653 {
3654 int ret;
3655
3656 if (!card->dev) {
3657 pr_err("card->dev is not set before calling %s\n", __func__);
3658 return -EINVAL;
3659 }
3660
3661 if (!np)
3662 np = card->dev->of_node;
3663
3664 ret = of_property_read_string_index(np, propname, 0, &card->name);
3665 /*
3666 * EINVAL means the property does not exist. This is fine providing
3667 * card->name was previously set, which is checked later in
3668 * snd_soc_register_card.
3669 */
3670 if (ret < 0 && ret != -EINVAL) {
3671 dev_err(card->dev,
3672 "ASoC: Property '%s' could not be read: %d\n",
3673 propname, ret);
3674 return ret;
3675 }
3676
3677 return 0;
3678 }
3679 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name_from_node);
3680
3681 static const struct snd_soc_dapm_widget simple_widgets[] = {
3682 SND_SOC_DAPM_MIC("Microphone", NULL),
3683 SND_SOC_DAPM_LINE("Line", NULL),
3684 SND_SOC_DAPM_HP("Headphone", NULL),
3685 SND_SOC_DAPM_SPK("Speaker", NULL),
3686 };
3687
3688 int snd_soc_of_parse_audio_simple_widgets_from_node(struct snd_soc_card *card,
3689 struct device_node *np,
3690 const char *propname)
3691 {
3692 struct snd_soc_dapm_widget *widgets;
3693 const char *template, *wname;
3694 int i, j, num_widgets, ret;
3695
3696 if (!np)
3697 np = card->dev->of_node;
3698
3699 num_widgets = of_property_count_strings(np, propname);
3700 if (num_widgets < 0) {
3701 dev_err(card->dev,
3702 "ASoC: Property '%s' does not exist\n", propname);
3703 return -EINVAL;
3704 }
3705 if (num_widgets & 1) {
3706 dev_err(card->dev,
3707 "ASoC: Property '%s' length is not even\n", propname);
3708 return -EINVAL;
3709 }
3710
3711 num_widgets /= 2;
3712 if (!num_widgets) {
3713 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3714 propname);
3715 return -EINVAL;
3716 }
3717
3718 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3719 GFP_KERNEL);
3720 if (!widgets) {
3721 dev_err(card->dev,
3722 "ASoC: Could not allocate memory for widgets\n");
3723 return -ENOMEM;
3724 }
3725
3726 for (i = 0; i < num_widgets; i++) {
3727 ret = of_property_read_string_index(np, propname,
3728 2 * i, &template);
3729 if (ret) {
3730 dev_err(card->dev,
3731 "ASoC: Property '%s' index %d read error:%d\n",
3732 propname, 2 * i, ret);
3733 return -EINVAL;
3734 }
3735
3736 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3737 if (!strncmp(template, simple_widgets[j].name,
3738 strlen(simple_widgets[j].name))) {
3739 widgets[i] = simple_widgets[j];
3740 break;
3741 }
3742 }
3743
3744 if (j >= ARRAY_SIZE(simple_widgets)) {
3745 dev_err(card->dev,
3746 "ASoC: DAPM widget '%s' is not supported\n",
3747 template);
3748 return -EINVAL;
3749 }
3750
3751 ret = of_property_read_string_index(np, propname,
3752 (2 * i) + 1,
3753 &wname);
3754 if (ret) {
3755 dev_err(card->dev,
3756 "ASoC: Property '%s' index %d read error:%d\n",
3757 propname, (2 * i) + 1, ret);
3758 return -EINVAL;
3759 }
3760
3761 widgets[i].name = wname;
3762 }
3763
3764 card->of_dapm_widgets = widgets;
3765 card->num_of_dapm_widgets = num_widgets;
3766
3767 return 0;
3768 }
3769 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets_from_node);
3770
3771 static int snd_soc_of_get_slot_mask(struct device_node *np,
3772 const char *prop_name,
3773 unsigned int *mask)
3774 {
3775 u32 val;
3776 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3777 int i;
3778
3779 if (!of_slot_mask)
3780 return 0;
3781 val /= sizeof(u32);
3782 for (i = 0; i < val; i++)
3783 if (be32_to_cpup(&of_slot_mask[i]))
3784 *mask |= (1 << i);
3785
3786 return val;
3787 }
3788
3789 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3790 unsigned int *tx_mask,
3791 unsigned int *rx_mask,
3792 unsigned int *slots,
3793 unsigned int *slot_width)
3794 {
3795 u32 val;
3796 int ret;
3797
3798 if (tx_mask)
3799 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3800 if (rx_mask)
3801 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3802
3803 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3804 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3805 if (ret)
3806 return ret;
3807
3808 if (slots)
3809 *slots = val;
3810 }
3811
3812 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3813 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3814 if (ret)
3815 return ret;
3816
3817 if (slot_width)
3818 *slot_width = val;
3819 }
3820
3821 return 0;
3822 }
3823 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3824
3825 void snd_soc_of_parse_audio_prefix_from_node(struct snd_soc_card *card,
3826 struct device_node *np,
3827 struct snd_soc_codec_conf *codec_conf,
3828 struct device_node *of_node,
3829 const char *propname)
3830 {
3831 const char *str;
3832 int ret;
3833
3834 if (!np)
3835 np = card->dev->of_node;
3836
3837 ret = of_property_read_string(np, propname, &str);
3838 if (ret < 0) {
3839 /* no prefix is not error */
3840 return;
3841 }
3842
3843 codec_conf->of_node = of_node;
3844 codec_conf->name_prefix = str;
3845 }
3846 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix_from_node);
3847
3848 int snd_soc_of_parse_audio_routing_from_node(struct snd_soc_card *card,
3849 struct device_node *np,
3850 const char *propname)
3851 {
3852 int num_routes;
3853 struct snd_soc_dapm_route *routes;
3854 int i, ret;
3855
3856 if (!np)
3857 np = card->dev->of_node;
3858
3859 num_routes = of_property_count_strings(np, propname);
3860 if (num_routes < 0 || num_routes & 1) {
3861 dev_err(card->dev,
3862 "ASoC: Property '%s' does not exist or its length is not even\n",
3863 propname);
3864 return -EINVAL;
3865 }
3866 num_routes /= 2;
3867 if (!num_routes) {
3868 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3869 propname);
3870 return -EINVAL;
3871 }
3872
3873 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3874 GFP_KERNEL);
3875 if (!routes) {
3876 dev_err(card->dev,
3877 "ASoC: Could not allocate DAPM route table\n");
3878 return -EINVAL;
3879 }
3880
3881 for (i = 0; i < num_routes; i++) {
3882 ret = of_property_read_string_index(np, propname,
3883 2 * i, &routes[i].sink);
3884 if (ret) {
3885 dev_err(card->dev,
3886 "ASoC: Property '%s' index %d could not be read: %d\n",
3887 propname, 2 * i, ret);
3888 return -EINVAL;
3889 }
3890 ret = of_property_read_string_index(np, propname,
3891 (2 * i) + 1, &routes[i].source);
3892 if (ret) {
3893 dev_err(card->dev,
3894 "ASoC: Property '%s' index %d could not be read: %d\n",
3895 propname, (2 * i) + 1, ret);
3896 return -EINVAL;
3897 }
3898 }
3899
3900 card->num_of_dapm_routes = num_routes;
3901 card->of_dapm_routes = routes;
3902
3903 return 0;
3904 }
3905 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing_from_node);
3906
3907 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3908 const char *prefix,
3909 struct device_node **bitclkmaster,
3910 struct device_node **framemaster)
3911 {
3912 int ret, i;
3913 char prop[128];
3914 unsigned int format = 0;
3915 int bit, frame;
3916 const char *str;
3917 struct {
3918 char *name;
3919 unsigned int val;
3920 } of_fmt_table[] = {
3921 { "i2s", SND_SOC_DAIFMT_I2S },
3922 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3923 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3924 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3925 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3926 { "ac97", SND_SOC_DAIFMT_AC97 },
3927 { "pdm", SND_SOC_DAIFMT_PDM},
3928 { "msb", SND_SOC_DAIFMT_MSB },
3929 { "lsb", SND_SOC_DAIFMT_LSB },
3930 };
3931
3932 if (!prefix)
3933 prefix = "";
3934
3935 /*
3936 * check "[prefix]format = xxx"
3937 * SND_SOC_DAIFMT_FORMAT_MASK area
3938 */
3939 snprintf(prop, sizeof(prop), "%sformat", prefix);
3940 ret = of_property_read_string(np, prop, &str);
3941 if (ret == 0) {
3942 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3943 if (strcmp(str, of_fmt_table[i].name) == 0) {
3944 format |= of_fmt_table[i].val;
3945 break;
3946 }
3947 }
3948 }
3949
3950 /*
3951 * check "[prefix]continuous-clock"
3952 * SND_SOC_DAIFMT_CLOCK_MASK area
3953 */
3954 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3955 if (of_property_read_bool(np, prop))
3956 format |= SND_SOC_DAIFMT_CONT;
3957 else
3958 format |= SND_SOC_DAIFMT_GATED;
3959
3960 /*
3961 * check "[prefix]bitclock-inversion"
3962 * check "[prefix]frame-inversion"
3963 * SND_SOC_DAIFMT_INV_MASK area
3964 */
3965 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3966 bit = !!of_get_property(np, prop, NULL);
3967
3968 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3969 frame = !!of_get_property(np, prop, NULL);
3970
3971 switch ((bit << 4) + frame) {
3972 case 0x11:
3973 format |= SND_SOC_DAIFMT_IB_IF;
3974 break;
3975 case 0x10:
3976 format |= SND_SOC_DAIFMT_IB_NF;
3977 break;
3978 case 0x01:
3979 format |= SND_SOC_DAIFMT_NB_IF;
3980 break;
3981 default:
3982 /* SND_SOC_DAIFMT_NB_NF is default */
3983 break;
3984 }
3985
3986 /*
3987 * check "[prefix]bitclock-master"
3988 * check "[prefix]frame-master"
3989 * SND_SOC_DAIFMT_MASTER_MASK area
3990 */
3991 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3992 bit = !!of_get_property(np, prop, NULL);
3993 if (bit && bitclkmaster)
3994 *bitclkmaster = of_parse_phandle(np, prop, 0);
3995
3996 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3997 frame = !!of_get_property(np, prop, NULL);
3998 if (frame && framemaster)
3999 *framemaster = of_parse_phandle(np, prop, 0);
4000
4001 switch ((bit << 4) + frame) {
4002 case 0x11:
4003 format |= SND_SOC_DAIFMT_CBM_CFM;
4004 break;
4005 case 0x10:
4006 format |= SND_SOC_DAIFMT_CBM_CFS;
4007 break;
4008 case 0x01:
4009 format |= SND_SOC_DAIFMT_CBS_CFM;
4010 break;
4011 default:
4012 format |= SND_SOC_DAIFMT_CBS_CFS;
4013 break;
4014 }
4015
4016 return format;
4017 }
4018 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4019
4020 int snd_soc_get_dai_name(struct of_phandle_args *args,
4021 const char **dai_name)
4022 {
4023 struct snd_soc_component *pos;
4024 struct device_node *component_of_node;
4025 int ret = -EPROBE_DEFER;
4026
4027 mutex_lock(&client_mutex);
4028 list_for_each_entry(pos, &component_list, list) {
4029 component_of_node = pos->dev->of_node;
4030 if (!component_of_node && pos->dev->parent)
4031 component_of_node = pos->dev->parent->of_node;
4032
4033 if (component_of_node != args->np)
4034 continue;
4035
4036 if (pos->driver->of_xlate_dai_name) {
4037 ret = pos->driver->of_xlate_dai_name(pos,
4038 args,
4039 dai_name);
4040 } else {
4041 int id = -1;
4042
4043 switch (args->args_count) {
4044 case 0:
4045 id = 0; /* same as dai_drv[0] */
4046 break;
4047 case 1:
4048 id = args->args[0];
4049 break;
4050 default:
4051 /* not supported */
4052 break;
4053 }
4054
4055 if (id < 0 || id >= pos->num_dai) {
4056 ret = -EINVAL;
4057 continue;
4058 }
4059
4060 ret = 0;
4061
4062 *dai_name = pos->dai_drv[id].name;
4063 if (!*dai_name)
4064 *dai_name = pos->name;
4065 }
4066
4067 break;
4068 }
4069 mutex_unlock(&client_mutex);
4070 return ret;
4071 }
4072 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
4073
4074 int snd_soc_of_get_dai_name(struct device_node *of_node,
4075 const char **dai_name)
4076 {
4077 struct of_phandle_args args;
4078 int ret;
4079
4080 ret = of_parse_phandle_with_args(of_node, "sound-dai",
4081 "#sound-dai-cells", 0, &args);
4082 if (ret)
4083 return ret;
4084
4085 ret = snd_soc_get_dai_name(&args, dai_name);
4086
4087 of_node_put(args.np);
4088
4089 return ret;
4090 }
4091 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4092
4093 /*
4094 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
4095 * @dev: Card device
4096 * @of_node: Device node
4097 * @dai_link: DAI link
4098 *
4099 * Builds an array of CODEC DAI components from the DAI link property
4100 * 'sound-dai'.
4101 * The array is set in the DAI link and the number of DAIs is set accordingly.
4102 * The device nodes in the array (of_node) must be dereferenced by the caller.
4103 *
4104 * Returns 0 for success
4105 */
4106 int snd_soc_of_get_dai_link_codecs(struct device *dev,
4107 struct device_node *of_node,
4108 struct snd_soc_dai_link *dai_link)
4109 {
4110 struct of_phandle_args args;
4111 struct snd_soc_dai_link_component *component;
4112 char *name;
4113 int index, num_codecs, ret;
4114
4115 /* Count the number of CODECs */
4116 name = "sound-dai";
4117 num_codecs = of_count_phandle_with_args(of_node, name,
4118 "#sound-dai-cells");
4119 if (num_codecs <= 0) {
4120 if (num_codecs == -ENOENT)
4121 dev_err(dev, "No 'sound-dai' property\n");
4122 else
4123 dev_err(dev, "Bad phandle in 'sound-dai'\n");
4124 return num_codecs;
4125 }
4126 component = devm_kzalloc(dev,
4127 sizeof *component * num_codecs,
4128 GFP_KERNEL);
4129 if (!component)
4130 return -ENOMEM;
4131 dai_link->codecs = component;
4132 dai_link->num_codecs = num_codecs;
4133
4134 /* Parse the list */
4135 for (index = 0, component = dai_link->codecs;
4136 index < dai_link->num_codecs;
4137 index++, component++) {
4138 ret = of_parse_phandle_with_args(of_node, name,
4139 "#sound-dai-cells",
4140 index, &args);
4141 if (ret)
4142 goto err;
4143 component->of_node = args.np;
4144 ret = snd_soc_get_dai_name(&args, &component->dai_name);
4145 if (ret < 0)
4146 goto err;
4147 }
4148 return 0;
4149 err:
4150 for (index = 0, component = dai_link->codecs;
4151 index < dai_link->num_codecs;
4152 index++, component++) {
4153 if (!component->of_node)
4154 break;
4155 of_node_put(component->of_node);
4156 component->of_node = NULL;
4157 }
4158 dai_link->codecs = NULL;
4159 dai_link->num_codecs = 0;
4160 return ret;
4161 }
4162 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4163
4164 static int __init snd_soc_init(void)
4165 {
4166 snd_soc_debugfs_init();
4167 snd_soc_util_init();
4168
4169 return platform_driver_register(&soc_driver);
4170 }
4171 module_init(snd_soc_init);
4172
4173 static void __exit snd_soc_exit(void)
4174 {
4175 snd_soc_util_exit();
4176 snd_soc_debugfs_exit();
4177
4178 #ifdef CONFIG_DEBUG_FS
4179 #endif
4180 platform_driver_unregister(&soc_driver);
4181 }
4182 module_exit(snd_soc_exit);
4183
4184 /* Module information */
4185 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4186 MODULE_DESCRIPTION("ALSA SoC Core");
4187 MODULE_LICENSE("GPL");
4188 MODULE_ALIAS("platform:soc-audio");